May Peace Mercy and Blessings of God be on all of you.
Thanks for giving me the oppertunity to answer this question.
Answer to the 1st part of the question (i.e why hindus dont eat non veg). for the 2nd part(i.e why Islam doesnt permit pork) please see the end. also i have explained why bible doesnt allow port as well.
Actually this is a misconception that Hinduism prohibits the non veg food .
I have proven below that Hinduism Allows the non veg food and also given the reasons why many hindus are vegitarians.
Hindu scriptures give permission to have non-vegetarian food
There are many Hindus who are strictly vegetarian. They think it is against their religion to consume non-vegetarian food. But the true fact is that the Hindu scriptures permit a person to have meat. The scriptures mention Hindu sages and saints consuming non-vegetarian food.
It is mentioned in Manu Smruti, the law book of Hindus, in chapter 5 verse 30
"The eater who eats the flesh of those to be eaten does nothing bad, even if he does it day after day, for God himself created some to be eaten and some to be eater."
Again next verse of Manu Smruti, that is, chapter 5 verse 31 says
"Eating meat is right for the sacrifice, this is traditionally known as a rule of the gods."
Further in Manu Smruti chapter 5 verse 39 and 40 says
"God himself created sacrificial animals for sacrifice, ...., therefore killing in a sacrifice is not killing."
Mahabharata Anushashan Parva chapter 88 narrates the discussion between Dharmaraj Yudhishthira and Pitamah Bhishma about what food one should offer to Pitris (ancestors) during the Shraddha (ceremony of dead) to keep them satisfied. Paragraph reads as follows:
"Yudhishthira said, "O thou of great puissance, tell me what that object is which, if dedicated to the Pitiris (dead ancestors), become inexhaustible! What Havi, again, (if offered) lasts for all time? What, indeed, is that which (if presented) becomes eternal?"
"Bhishma said, "Listen to me, O Yudhishthira, what those Havis are which persons conversant with the rituals of the Shraddha (the ceremony of dead) regard as suitable in view of Shraddha and what the fruits are that attach to each. With sesame seeds and rice and barely and Masha and water and roots and fruits, if given at Shraddhas, the pitris, O king, remain gratified for the period of a month. With fishes offered at Shraddhas, the pitris remain gratified for a period of two months. With the mutton they remain gratified for three months and with the hare for four months, with the flesh of the goat for five months, with the bacon (meat of pig) for six months, and with the flesh of birds for seven. With venison obtained from those deer that are called Prishata, they remain gratified for eight months, and with that obtained from the Ruru for nine months, and with the meat of Gavaya for ten months, With the meat of the bufffalo their gratification lasts for eleven months. With beef presented at the Shraddha, their gratification, it is said , lasts for a full year. Payasa mixed with ghee is as much acceptable to the pitris as beef. With the meat of Vadhrinasa (a large bull) the gratification of pitris lasts for twelve years. The flesh of rhinoceros, offered to the pitris on anniversaries of the lunar days on which they died, becomes inexhaustible. The potherb called Kalaska, the petals of kanchana flower, and meat of (red) goat also, thus offered, prove inexhaustible.
So but natural if you want to keep your ancestors satisfied forever, you should serve them the meat of red goat.
Hinduism was influenced by other religions
Though Hindu Scriptures permit its followers to have non-vegetarian food, many Hindus adopted the vegetarian system because they were influenced by other religions like Jainism.
Even plants have life
Certain religions have adopted pure vegetarianism as a dietary law because they are totally against the killing of living creatures. If a person can survive without killing any living creature, I would be the first person to adopt such a way of life. In the past people thought plants were lifeless. Today it is a universal fact that even plants have life. Thus their logic of not killing living creatures is not fulfilled even by being a pure vegetarian.
Even plants can feel pain
They further argue that plants cannot feel pain, therefore killing a plant is a lesser crime as compared to killing an animal. Today science tells us that even plants can feel pain. But the cry of the plant cannot be heard by the human being. This is due to the inability of the human ear to hear sounds that are not in the audible range i.e. 20 Hertz to 20,000 Hertz. Anything below and above this range cannot be heard by a human being. A dog can hear up to 40,000 Hertz. Thus there are silent dog whistles that have a frequency of more than 20,000 Hertz and less than 40,000 Hertz. These whistles are only heard by dogs and not by human beings. The dog recognizes the masters whistle and comes to the master. There was research done by a farmer in U.S.A. who invented an instrument which converted the cry of the plant so that it could be heard by human beings. He was able to realize immediately when the plant itself cried for water. Latest researches show that the plants can even feel happy and sad. It can also cry.
Killing a living creature with two senses less is not a lesser crime
Once a vegetarian argued his case by saying that plants only have two or three senses while the animals have five senses.
Therefore killing a plant is a lesser crime than killing an animal. Suppose your brother is born deaf and dumb and has two senses less as compared to other human beings. He becomes mature and someone murders him. Would you ask the judge to give the murderer a lesser punishment because your brother has two senses less? In fact you would say that he has killed a masoom, an innocent person, and the judge should give the murderer a greater punishment.
The fact that consumption of pork is prohibited in Islam is well known. The following points explain various aspects of this prohibition:
2nd part ( why pork is forbidden in Islam)
Pork prohibited in Qur’an
The Qur’an prohibits the consumption of pork in no less than 4 different places. It is prohibited in 2:173, 5:3, 6:145 and 16:115.
"Forbidden to you (for food) are: dead meat, blood, the flesh of swine, and that on which hath been invoked the name of other than Allah." [Al-Qur’an 5:3]
The above verses of the Holy Qur’an are sufficient to satisfy a Muslim as to why pork is forbidden.
2.
Pork prohibited in the Bible
The Christian is likely to be convinced by his religious scriptures. The Bible prohibits the consumption of pork, in the book of Leviticus
"And the swine, though he divide the hoof, and be cloven footed, yet he cheweth not the cud; he is unclean to you".
"Of their flesh shall ye not eat, and their carcass shall ye not touch, they are unclean to you."
[Leviticus 11:7-8]
Pork is also prohibited in the Bible in the book of Deuteronomy
"And the swine, because it divideth the hoof, yet cheweth not the cud, it is unclean unto you. Ye shall not eat of their flesh, nor touch their dead carcass."
[Deuteronomy 14:8]
A similar prohibition is repeated in the Bible in the book of Isaiah chapter 65 verse 2-5.
3.
Consumption of pork causes several diseases
The other non-Muslims and atheists will agree only if convinced through reason, logic and science. Eating of pork can cause no less than seventy different types of diseases. A person can have various helminthes like roundworm, pinworm, hookworm, etc. One of the most dangerous is Taenia Solium, which is in lay man’s terminology called tapeworm. It harbours in the intestine and is very long. Its ova i.e. eggs, enter the blood stream and can reach almost all the organs of the body. If it enters the brain it can cause memory loss. If it enters the heart it can cause heart attack, if it enters the eye it can cause blindness, if it enters the liver it can cause liver damage. It can damage almost all the organs of the body.
Another dangerous helminthes is Trichura Tichurasis. A common misconception about pork is that if it is cooked well, these ova die. In a research project undertaken in America, it was found that out of twenty-four people suffering from Trichura Tichurasis, twenty two had cooked the pork very well. This indicates that the ova present in the pork do not die under normal cooking temperature.
4.
Pork has fat building material
Pork has very little muscle building material and contains excess of fat. This fat gets deposited in the vessels and can cause hypertension and heart attack. It is not surprising that over 50% of Americans suffer from hypertension.
5.
Pig is one of the filthiest animals on earth
The pig is one of the filthiest animals on earth. It lives and thrives on muck, faeces and dirt. It is the best scavenger that I know that God has produced. In the villages they don’t have modern toilets and the villagers excrete in the open air. Very often excreta is cleared by pigs.
Some may argue that in advanced countries like Australia, pigs are bred in very clean and hygienic conditions. Even in these hygienic conditions the pigs are kept together in sties. No matter how hard you try to keep them clean they are filthy by nature. They eat and enjoy their own as well as their neighbour’s excreta.
6.
Pig is the most shameless animal
The pig is the most shameless animal on the face of the earth. It is the only animal that invites its friends to have sex with its mate. In America, most people consume pork. Many times after dance