I'm not saying don't confront them... but that policies aren't necessarily the answer. The answer is actual engagement from a rational perspective.
"You know, you think my sexuality is an abomination that should not exist and I will go to hell, but have you ever considered that - hear me out - this could not be the case? Do you have any data to back this up? Aren't you falling into an ad hominem fallacy?"
"Ah right, you have correctly pointed out a gaping hole in my otherwise excellent deductive reasoning. I hereby bow to your argument and am not homophobic anymore."
And once again, the power of rational debate shines through and through.