What's the fuss about Zeitgeist?

Zeitgeist, The Movie is one of the latest installments of internet media out to debunk Christianity. Zeitgeist has created a furor with over one million viewers tuning in on Google.  The movie claims that Christianity is simply one among many of the "dying god" myths.
In addition, the book Shattering the Christ Myth deals specifically with the “dying god” myths on which Zeitgeist is based.  An online apologetics site, Tektonics, provides additional bibliographic resources for further study, as well.
With regards to the claim that all religious systems essentially believe the same thing or have the same origin, one simply needs to examine world religions to know that is not true.  World religions make very different claims about the nature of reality, why we are here, where we are going, and what is the nature of all the evil in the world.  For a comprehensive look at World Religions, you may want to take a look at any or all of the following resources:
Finally, if you want to explore more, some have found Nicholas Perrin's book, Lost In Transmission: What We Can and Cannot Know about the Words of Jesus, to be a helpful resource.  Perrin discusses the "Christ myths," and provides an excellent defense of the New Testament as a trustworthy and reliable source for knowing the real Jesus.
An excellent critique of the Zeitgeist movie can be found on Dr. John Stackhouse's blog and at the Centre for Public Christianity