What you have to do is replace the word theist in anti-theist with something else: Black, gay, etc. to realize what you are saying. You don't have to like the concept of religion, but being anti-theist is a kind of bigotry, to me. And religion does nothing on it's own- only people who follow it and not everyone does the same things.
It really depends on what she means exactly. Some people can't help but be theists, of course. But it is well past time to denounce some of the excesses made in name of the belief in God.