This reminds me of the Spanish joke about the little boy with his mother who is a prostitute. The little boy as standing next to his mother while she's having an argument with another woman. While the argument is going on and on, the little boy keeps yelling to his mother "call her a whore mom, call her a whore". Till finally the mother bends over and says why are you saying that? And the little boy answers, call her a whore mom, before she calls you one.
People who are quick to call others heretics, ites, ists , are just giving away their own doubts about themselves.