I didn't say "only", what I said was all she did was give him a zero. Meaning, she didn't molets him or attack him, she failed him on an art project. Hardly evil incarnate. He wasn't punished until he tore up the policy.
Let me ask this and I know I'll be jumped all over, but what the hell. If this was a Muslim student or a Pagan student, would we be calling the teacher one who walks on the "dark side?" I highly doubt it. We'd be saying we're tired of Muslims thinking they don't have to obey the rules or that Pagans were probably drawing demons. Bottom line, other students complained, he was asked to remove the Bible verse and instead tore up the school policy. There is no excuse for that. Again, had it been a student of a different faith, we wouldn't even be having this conversation.