OH I HAVE SEEN THE LIGHT!
Lovely title there eh? Well:
Why do we bother arguing with Christians and Creationists?
Lil' Disclaimer: I'm not regarding ALL theism, just Christianity.
If you're dumb enough to believe in Christianity you won't understand science and if you will, chances are you haven't read the bible fully. We have no means of convincing them they're idiots because they'll just stare blankly at you with a drool hanging out of their mouths and then when their brain starts working they come up with some completely contradictory snappy remark. I vote we give up on Christians all together, if they want to sacrifice their "free will" for fantasies I say let them.
"I do not think it is necessary to believe that the same God who has given us our senses, reason, and intelligence wished us to abandon their use, giving us by some other means the information that we could gain through them." ~Galileo Galilei