Your sources are all unsubtantiated attempts to link the different religious figures and the mythology surrounding them, and have no basis in historical information.
There is no specific birth date that I can find for Horus.
Here is a link to a site that has direct translations of Egyptian monuments on the subject. Also, Horus never died, and so could not be ressurected.
One of your sites lists The Buddha as being born on dec 25 to a virgin mother which is false. Siddartha Gautama was the child of King Shuddodana Gautama and his wife Mahamaya. The only birth month I can find listed for The Buddha is May
on this site but most sources only say that he was born around 563 B.C. with no specific date because there are no accurate historical records on the subject.
Mithras was not born of a virgin, or of a female at all. All mithraic myths say that mithras sprouted from a rock before the beginning of time (meaning there could not have been a date).
Krishna was born to his parents, Princess Devaki and her husband Vasudeva in the month of Sravan which compares to late august, early semptember. According to references in the
Bhagavata Purana,
Bhagavad Gita, and the
Matsya Purana, he died around 3100 BCE at the age of 125 years and there is no mention of a ressurection similar to Christ's.
There are two things you have to realize.
A)Christians changed a lot of previous mythology to appear similar to their own
B) The authors of Zeitgeist and those other sites have an agenda that they are pushing and are willing to bend the truth to accomplish their goals. Perhaps you should do some research of your own instead of taking this sort of sensationalist propaganda at face value.
Edit: While looking for sources for all this information, I found a thread on another forum in which someone said something that I think is very important and worth repeating, especially after several advocates of this film have thrown the word 'fact' around;
Your sources are all unsubtantiated attempts to link the different religious figures and the mythology surrounding them, and have no basis in historical information.