While I like and totally agree with your Biological views, Mass, I have to disagree with your theological ones. The world Faiths, are not "more alike then different." It is really had to for someone to make such a statement, with each faith split up into many more Sects. Pure land Buddhists and Roman Catholicism, for example, have a Lot in Common, but there is no comparison between Zen Buddhism and Roman Catholicism, they are so different! What few similarities that most faiths do share, I believe, come not from a similarity in the dogma itself, but an agreement on certain universal laws (e.g. Karma).
Anyways, my point is, these faith may have a lot in common, however they are different enough that someone has to be wrong. Is Jesus the son of God come to same us from Eternal Damnation? Will we be/have we been Reincarnated? These a questions that aren't a matter of option. Either they are true, or they are false. Someone has to be more right. The problem is finding out who that is...