You know you dont have to be religious to hate gays. If being an atheist is all that it takes for you to lose business your probably not that good at your job in the first place.
and when was the last time there was a "holy war" and while i am on the subject of ideological killings more people in the 20th were killed by communist states with state enforced atheism than any religion.
And what about "black churches", as far as i know the vast majority of churches worldwide aren't segregated, people self segregate naturally. Or you could be referring to ethnocentric religions such as the nation of Islam or black christian theology, in regard to that people have the right to believe in whatever they like whether its some nutty religion or the atheist Hitlers belief in a superior blond haired blue eyed Germanic master race you can find bigots in any ideological belief system.