Well its not religious people as a whole that I think are insane. Maybe I find the event of the bible to absurd by all logic, but I know that the vast majority of religious people are intelligent and in-touch people, not to mention I have - well I think we all have - Christian friends. Its not the people I think are insane and I understand people siding with faith because they feel it empowers them, provides comfort, etc.
I just think that the idea that the Rapture, Doomsday or whatever calculated, mega-scale and divine intervention will happen is crazy, because it defies the very nature of the universe and just isn't logical.
I could go into all the details and inconsistencies I have with the 2012 Doomsday theory but that probably isn't necessary, touchy topics like this rarely result with any compromise, myself included. But I think I should clarify that I don't find the people crazy, just the act of believing the idea of Doomsday I think is devoid of scientific logic.
So I'll leave it at that, since I generally have a shitty habit of unintentionally instigating fights over these topics.