God wants me to show believers that he doesn't exist.
Surely if an all knowing god exists he knew that I would come into existence showing believers the flaws in his system, showing believers that the Abrahmic gods are impossible. If this god is all powerful he would've also been able to make sure I never came into existence, and this wouldn't have affected the free will of believers in the least. That argument aside, here's a more basic one for you...
Today, I was set to play a round of golf with my son. It rained. So instead of golfing I engaged several theists in a debate, recorded audio responses to irrational mail, worked in other back-end areas for RRS (try to avoid the easy joke), and edited a portion of a future show. Surely an all knowing god would've known that it was either golf or help end Religion. God chose to make it rain so that I would help end Religion, god wants me to end Religion.
Or maybe, just maybe... god doesn't exist. Think theists.