If you talk to a christian about, say, the holocaust, they’ll say that the Nazi’s weren’t really christian. The crusaders who raped and pillaged their way across Europe? Not really christian. The inquisitioners, who tortured and killed all of those innocent people in the name of christianity? Not really christian. Tim McVeigh? Not really christian. Anyone who’s ever done anything bad? Not really christian. But man, those damned muslims and atheists – look at how many people they’ve murdered! They’re evil, pure evil!
And the atheists? Same damn thing. One of the atheists who persistently peppers my mailbox every time I mention my Judaism has repeatedly said “Only religious people blow themselves up, there are no atheist suicide bombers”. I pointed out a number of purely secular groups that have used suicide bombers. “They’re not really atheists; just because they’re part of a secular movement doesn’t mean that they’re atheists”. How do you know that they’re not atheists? “Because only religious people blow themselves up.” Wait, isn’t that circular? “No, because atheists are rational, and blowing yourself up is irrational, therefore if you blow yourself up, you’re not an atheist”.
Same stupid argument: People like me are good and reasonable; anyone who isn’t good and reasonable can’t be like me. It doesn’t matter what they say they think. It doesn’t matter what they say they believe. I know better – if they do something that I don’t like, then they’re not part of my group.