there was a thread earlier this week where a guy was asking for proof that blacks were intelligent
had it been a question about women being intelligent i guess it wouldn't have made the number of pages it did
so the definition for sexism or racism is indeed useful and I would suggest to basically sum it up as referring to a person's quality/capacity/talent/etc. as that of a woman/race instead of that of an individual
at the same time it should be allowed to criticize religions and ideologies independtenly of the people that compose it
so you can attack communism, but you can't say communists are morons