A new Jesus conspiracy theory

There is this new book coming out that claims that Jesus is not a prophet, and never really wanted to start a religion, but instead wanted just to rule Israel and was the bastrad son of Mary and a Roman soldier. Oh yeah. This reminds me of this other book I read, it was called "The Christ Conspiracy: The greatest story ever sold!". The book, written by an archeologist, basically had the premise and the "historical evidence" to prove that not only was the story of Jesus stolen from the Legends of Horus and Vishnu, but that the disciples never really existed either, and were taken from other eastern legends. That the whole thing is a myth. For real. I thought the whole thing was incredible, because, well, not only did the author of that book disprove christianity and jesus, he disproved Islam as well. You see, the Koran is very specific in its mention of Jesus and Mary and christianity as a previous religion of good. If you prove that Jesus didn't exist, then by extension you prove that the Koran is false, and poof, you have gotten rid of 2 religions for the price of one. I am glad no one on the islamic side of things made that connection yet, other wise this dude would've gotten killed faster than you can say Fatwa.