Much of what is called PC today was just good manners back in the old days.
Oh wait, coming to a enclave near you (see Colorado for instance) one can no longer say any disparaging remarks about homos, less they be charged with hate crimes, after all, it is embarrassing and "rude" to do so.
It is rude, but does not rise to the level of a hate crime.
I think this issue boils down to this. Do people have the right to be rude? It is not, “should people be rude?”. We have the right to be rude, but we should be polite to others.