How to deal with people at school who?

are being obnocious and annoying my problem is that i am in a micro biology cl and in a debate cl and well the problem is that i am in the bible belt and a STRONG athiest and ever since we started debating evolution vs creationism people have been total aholes to me and even when i am at lunch i pretty much get corned at my table where i am sitting at by bible thumpers threatining me for how they put "talking **** about thier god" and now i am getting threats on my myspace page from pple i dont even know saying if i dont not stop talking **** about god and "accept christianity" i will get the **** beat outta me soo any tips on how to get all this to stop btw i have already tried ignoring them but they follow me and i cannot switch schools at this time and i dont wanna fight them cause i cant go to jail again thanks