Most of this comes as much from the Zeitgeist movie as anything else. Some of the claims you mention were laid out by "Acharya S" (pseudonym) in her book "The Christ Conspiracy" - pages 114-116. Similar "Christ myth" skeptics like Tom Harpur, Freke and Gandy have said things along the same line. But even they don't make some of the claims (as you'll see), so I think Zeitgeist produces made them up.
Despite what many here are saying about how this "is well known fact" talked about by scholars for the past few decades - that is WRONG. It has been a point of speculation, for sure...
No doubt, the early church fathers did ponder some of the similarities of major religions, but they were not as numerous as the claims laid forth. Let's look at them, shall we?
1) son of god? No, but "Great God, Chief of the Powers, Master of Heaven, Avenger of His Father. I suppose him being born of a god could be used, but then so would Hercules be as well. And I don't thnk anyone would say the greeks somehow thought of a Christ-like figure in Heracles!
2) born of a virgin? "...Horus was NOT born of a virgin at all. Indeed, one ancient Egyptian relief depicts this conception by showing his mother Isis in a falcon form, hovering over an erect phallus of a dead and prone Osiris in the Underworld (EOR, s.v. "Phallus")
3) time alone in the desert? I'm not even sure where this idea comes from! I see no record of it at all, and it would not even provide meaning to the Horus myth. Why would the great warrior God, son of Osiris, need to spend "time alone" if he was so powerful?
4) tempted by the devil? The "devil" is more of a Jewish/Christian personna (religions like Mithraism had similar figures).Horus may have been said to have had alot of battles with Set, but the "temptation" motif again makes no sense for Horus' mythical story of battling with strength.
5) 12 apostles? " 4 "disciples"--variously called the semi-divine HERU-SHEMSU ("Followers of Horus") [GOE:1.491]. 16 human followers (GOE:1.196). And I can find reference to an UNNUMBERED group of followers called mesniu/mesnitu ("blacksmiths") who accompanied Horus in some of his battles.
Horus is NOT the sun-god (Re is), so it makes no sense to use the "solar gods have twelve disciples in the Zodiac" argument.
6) baptized in a river?
7) performed miracles?
8) raised the dead?
"Miracle stories abound, even among religious groups that could not possibly have influenced one another, such as Latin American groups (e.g. Aztecs) and Roman MR's, so this 'similarity' carries no force. The reference to this specific resurrection I cannot find ANYWHERE in the scholarly literature....The fact that something so striking is not even mentioned in modern works of Egyptology indicates its questionable status. It simply cannot be adduced as data without SOME real substantiation."
9) walked on water? "Not that I have found, but he was thrown in the water"
10) crucified? Not that I can find! I can't find anything about his "death"! Does someone have any record of it?
11) born on Dec. 25th? NO. "Horus...born on the 31st day of the Egyptian month of Khoiak" So 1 day out of 365 we can say he was born on, but without knowing the Egyptian calendar, it's a 1/365 chance to be Dec. 25th
And for anyone claiming "conspiracy" by editors of Wikipedia, here is just ONE comment by an editor at Wikipedia:
"First off, I am not a Christian. I did some research and pretty much figured out that this and the other claims of the similarity to Jesus are more than myths, most of them are out right lies or trying to deceive or mislead intentionally....I did a whole paper on this in class and found out it's a bunch of lies. We should start a page on it I will have things back up what I say. —Preceding unsigned comment added by VegSXEBassist (talk • contribs) 21:20, 4 October 2007 (UTC)