Check out
conspiracyscience.com. It provides a devastating debunking of almost everything related to the Zeitgeist movie.
Basically, in Part One (i.e. the anti-religion part), the movie hugely misrepresents many different ancient mythologies to prove Christianity just stole from them. It claims the gods Jesus is supposedly based on were all born on December 25th, performed miracles, were crucified, and rose in 3 days…but none were except for Jesus (and Jesus wasn’t even born on December 25th in the first place). One such god the movie claims Jesus is based on is Horus, which the movie [incorrectly] claims to be the Egyptian “Sun God” (when it was actually Ra), and claims Jesus was also a “Sun God” because Jesus is the “Son of God”, as if “Sun” and “Son” are the same thing, when they’re actually not (they only sound similar in English, which of course the ancients didn’t speak).
My favorite claim though is when the movie claims from the perspective of the northern hemisphere, around December 23rd-25th, the Sun resides in the vicinity of the Southern Cross, and perceivably stops moving for 3 days, as if this symbolizes Jesus’s crucifixion. The big problem with this though is the Southern Cross isn’t even visible in the northern hemisphere!
This website also discusses the sources Zeitgeist uses, especially “The Christ Conspiracy” by Acharya S, which is a major source for Part One. The author of the website actually goes through Acharya S’s credentials, and pretty much proves her to be a liar and a fraud.
Anyway, yes, the guy who made these videos (Peter “Joseph” Merola) is just blowing steam. I’d definitely check out the rest of the Zeitgeist section on this website. It has a lot on him, too.