This Zeitgeist movie comes up for discussion every now and then.
I'm only going to comment on the religion part of the movie.
Since I have already replied to the same topic before, on another forum in my own language, I thought I'd just translate those thoughts here. So here are my (then) thoughts. It is not a 'scholarly dissertation', it's simply a few observations I made when I last saw the movie (some time ago).
-It's a fascinating, thought provoking piece of supposition, but it is a little light on the facts. Zeitgeist rolls out the similarities between various god myths, among them the date the 25th. of December, a date on which many gods supposedly have been born.
Let's take Jesus (he's the best known to us): that date is not mentioned anywhere in the Bible [as anyone on this forum knows], but was incorporated a couple hundred years later to ease the transition for the pagan religions into Christianity. Pretty much the opposite of what Zeitgeist says.
-If the 'fact' that all these deities mentioned in the movie were born on the same date of Dec. 25th. was either caused by an ancient conspiracy, and/or the result of all religions having the same origin (astrology, sun worship), the date should of course have been directly mentioned in the original biblical manuscripts (because the originators of the conspiracy would have put it there, or in the other scenario, it would have been retained from its pagan origins), and not 'tacked on' much later. In other words; if Jesus was a copy of the ancient myths, and those earlier mythical gods were born on December 25th., one would expect that in the 'copying process', the date would have been mentioned in the Bible as well.
Zeitgeist argues that the three Kings were in reality the three stars in Orion's Belt, which on Dec. 25th. is in line with Sirius ('the guiding star') and the sun (Sun/Son), and that they therefore 'pointed' toward the birthplace of Jesus (the sun), because Jesus was nothing more than a symbol of the sun (according to Zeitgeist). As mentioned, Dec. 25th. is out of the picture already when it comes to Jesus, and when it comes to 'the three Kings', [as we know] they are 1) not numbered in the Bible other than in the number of gifts for Jesus (they could have been ten people who thought these three gifts were the best), and 2) they are not called Kings, but more like astrologers ('magi'). These attributes are later additions to the story in later traditions. So - how can the 'three kings' be an astrological symbol of the three stars of Orion, when we don't know from the biblical story how many these "kings" were?
The movie says that the Son (and also "the Sun = Son") died and was resurrected after three days at solstice, because - according to the movie - Jesus is nothing but a symbol of the Sun. Since this (solstice) happens in December, I don't understand what they're saying here. Jesus did (according to the Bible) not die in December, so how do these two things gel? Again - if the Jesus story is only a copy of older myths, he should have died around solstice in the Bible as well, to be in accordance with this movie's suggestions.
When it comes to the other gods who allegedly have a lot in common with Jesus; born Dec. 25th, of a virgin, etc. etc., it's hard to find sources that verify this for many of these things (in the little search I've done). On the contrary, if one simply uses Wikipedia and look up Krishna, Mithra and Horus, they're not said to have been born on Dec. 25th. By all means - some other sources say that Mithra for instance was born on Dec. 25th., but since that's around solstice, it's not so strange that a sun god is born then. But the Zeitgeist producers use this as proof that Jesus and therefore Christendom is based on sun worship and that the Bible is little else than an astrological book/manual. But when it comes to the Bible, the Dec. 25th. date was added in later traditions, as said.
-They also have quite a few rather weird and far fetched 'word plays' which they say proves what they're asserting: 'Son' is supposed to come from 'Sun', and "god's son" is therefore also "god's sun" (!?). Horus is then evidently close enough to the English word 'hours' that they just as well say that 'hours' comes from the name Horus. Isn't it rather the case that the English word 'hours' comes from the Anglo-French 'ure', 'eure', from Late Latin 'hora', and from Greek hora, as a dictionary tells me? Zeitgeist also says that the English word 'horizon' comes from 'Horus has risen'. It's a tempting superficial likeness, but... When I look it up, I find this: [Middle English orizon, from Old French, from Latin, from Greek horizĂ´n (kuklos), limiting (circle), horizon present participle of horizein, to limit, from horos, boundary.]
Not only that; the god Set fights against Horus and wins (or loses, depending on the time of day), and this according to Zeitgeist shows that the English word 'sunset' comes from the name of the god Set. OK... "Sunset". One also says "the setting of the Sun" in English. Does this then mean that the sentences "She set him straight" or "He set the plates on the diner table" has anything to do with the god Set? Likewise; Can one then just as well say that the god Horus was the 'god of the Whores', since the words look alike? [sorry about that flippant remark] I find these similarities in (English) words a strange form of argument, especially since I can't find any sources to back them up.
Jesus says in a biblical passage that his disciples are going to meet a guy with a pitcher of water, and that that guy will tell them where to go. According to Zeitgeist, this has to symbolize the zodiac sign Aquarius. OK - - it couldn't just happen to be a guy with a pitcher of water, then? I find it far fetched that this shows that the Bible is nothing but an astrological manual.
The halo (with cross) around Jesus' head in icon paintings is used as 'proof' that Jesus is the center of the zodiac wheel, and therefore 'the Sun'. But looking at the icon paintings, it could just as well simply be a representation of a halo with a cross in the middle, or a crown of thorns and a cross. - In fact, Zeitgeist takes this as far as claiming that "crown of thorns" must point to rays of sunlight through the branches of trees (!?), in an effort to show the further likeness between Jesus and a sun god. This part of the movie is just a little too out there for my tastes...
In the first version of Zeitgeist that was uploaded, in the part where they ask for extra biblical sources of Jesus' existence, they said "None. There are no such sources." (or words to that effect). When I saw the finished version on Google video, they had suddenly included Tacitus and Josephus, but quickly brushed them aside. The fact that they didn't mention them in the first draft tells me they either didn't know (bad research and basic knowledge), or knew but chose not to include it.
All this said, there are a lot of similarities between various religions, and they may in many respects have the same origin. I don't disagree with this thought, I just find that this movie (last I saw it) is reaching too much and is too speculative. The movie brings up quite a few interesting things that sound logical, but I feel that when they allow themselves to use arguments that are so far fetched, one has to question the veracity of the rest of their claims as well.
Even as an atheist, it's smart not to hang on to any story and say "That's exactly what I thought - it's all bullshit!". It may well all be 'bullshit', but I think that the arguments should be solid anyway and well researched.
I think the Zeitgeist movie is a good reminder not to trust anything we're told just because it's been told by a lot of people over a long period of time. But the (deliberate?) irony here is that the movie itself should be treated the same way, with a healthy dose of skepticism.