Atheists: spend too much time whining about Christians.
Nazis: spend too much time whining about and beating up Jews.
Muslims: bomb people. Nuff said.
Buddhists: too wimpy to pick a fight.
Jains: even more wimpy than Buddhists.
Hindus: Don't know if they believe in one God or Many, have confusing temple sculptures, have movements and religions all over the place while pretending to be one religion, and are just plain confused.
Shinto: the old religion that is part of how Japan managed to get past Buddhism's wimpiness. But which gods and which goddesses are which gods and which goddesses, or are they all supposed to be the Buddha? And what's with those pesky water kappas anyhow?
Confucianism (Confusionism?): too father-centric and duty centric (obey Daddy! do nothing for yourself!), but also part of how Japan dealt with Buddhism.
Taoists: are too obsessed with Ying and Yang.
Maoists: wave little red books till you're sick of it.
Communists: sing and parade until you're sick of it.
Rastafarians: *cough* *cough* marijuana smoke! *cough*
Baha'i: go a-whoring after yet another "prophet"
Mormons: Boring