Who the crap is Xenu?

Xenu, according to L. Ron Hubbard, is the galactic overlord that has conquered the galaxy and has killed many aliens. He needed a dumping ground for the spirits of the deceased aliens so he came to earth and released them here. They inhabited the existing animals, jumpstarted evolution, and now these alien spirits, or Thetans, inhabit us. They are the cause of depression, ill feelings, insecurity, violence, hate, etc. Any local Scientology center can give you a Thetan count and help you rid yourself of them, mostly through vitamins and such.

We have a friend who said, in regards to this, that Christianity has some weird beliefs as well. My response to this (alas I only heard it secondhand) is that while Christianity has incredible beliefs, the lynchpin of our faith, that being the bodily resurrection of Christ, is based on history. Even Bhuddism and Islam and Judaism are based on historical people doing actions. Bhudda sat under a tree, Muhammed started a religion, and, well, I believe the people in the OT did what they did, but there was still an historical Moses, David, etc.

There's a book called "In search of the historical Christ." Such a book exists because there was an historical Christ. The idea of an historical Xenu is rediculous, thus I and my friends found my header funny.