Jesus gave a parable regarding weeds sown in among wheat at Matthew 13:24-30. He provided an explanation for his apostles at Matthew 13:36-43.
At Acts 20:29 Jesus warns his apostles that "oppressive wolves will enter in among you".
At 2 Corinthians 11:12-15 it says: "Now what I am doing I will still do, that I may cut off the pretext from those who are wanting a pretext for being found equal to us in the office of which they boast. For such men are false apostles, deceitful workers, transforming themselves into apostles of Christ. And no wonder, for Satan himself keeps transforming himself into an angel of light. It is therefore nothing great if his ministers also keep transforming themselves into ministers of righteousness. But their end shall be according to their works."
2 Thesselonians 2:3 says regarding the end of the system of things foretold by Jesus - "Let no one seduce you in any manner, because it will not come unless the apostasy comes first and the man of lawlessness is revealed, the son of destruction."
1 Timothy 4:1 warns that "some will fall away from the faith, paying attention to misleading inspired utterances and teachings of demons"
2 Timothy 4:3-4 says "For there will be a period of time when they will not put up with the healthful teaching, but, in accord with their own desires, they will accumulate teachers for themselves to have their ears tickled; and they will turn their ears away from the truth, whereas they will be turned aside to false stories."
2 Peter 2:1-3 says "However, there also came to be false prophets among the people, as there will also be false teachers among YOU. These very ones will quietly bring in destructive sects and will disown even the owner that bought them, bringing speedy destruction upon themselves. Furthermore, many will follow their acts of loose conduct, and on account of these the way of the truth will be spoken of abusively. Also, with covetousness they will exploit YOU with counterfeit words. But as for them, the judgment from of old is not moving slowly, and the destruction of them is not slumbering."
The point of all of these scriptures in relation to your question is that Christians are like Jesus' parable of the wheat and weeds. A little agricultural information for you - there are weeds that resemble wheat almost identically. The differences are so subtle that they aren't seen until the harvest time. Similarly with Christ's parable, false Christianity has been sown in among true Christianity and until the conclusion of this system they will continue to grow together, but the differences become more and more noticeable as the conclusion nears its end. So basically speaking, when you hear self-proclaimed Christians say things like what you've listed above, you can be assured that they aren't true followers of Christ.
As for the anti-Christ, 1 John 2:18,19 says that "there have come to be many antichrists...They went out from us, but they were not of our sort; for if they had been of our sort, they would have remained with us." Further, at 1 John 2:22 it says "This is the antichrist, the one that denies the Father and the Son." 2 John 4 states that "many deceivers have gone forth into the world, persons not confessing Jesus Christ as coming in the flesh. This is the deceiver and the antichrist."
What you can see from these scriptures is that the antichrist is not as depicted in movies...a really bad child who is in desperate need of being done away with. In reality the antichrist is anyone straying from the teachings of Christ and deceiving others in that regard.
I believe the motto of America is that it is "one nation under God"...but the question of the day should be WHICH god? Note that Satan is referred to as "the god of this system of things" at 2 Corinthians 4:3, 4.