Extremism

I was watching Glenn Beck last night and he had a story on a man who is being convicted for murder. This loon believes that he was sent by God (the Christian one) to kill abortion doctors. His point was a great one. Everyone, no matter the religion, has a duty to call out the extremists. This man does not represent my religion. I am pretty certain that Jesus didn't say "mine is the kingdom of Heaven...and to get there you need to kill abortion doctors and non-believers." Of course that could be in the lost gospels of the Bible. I could be wrong. Extremism in any religion is wrong. The Catholic history of wiping out protestants (of which I am), was wrong. Once again, Jesus never said anything about slaying the non-believer. Though there is a religion out there that does advocate that belief. Anyone guess which one?