Have you ever visited? Talked to locals? You might be surprised how friendly people are IRL.
I'm not gay and when I mentioned it to one of my Chicago friends, and he just shrugged his shoulders and said, "Yeah."
tl;dr jerks are everywhere
Look at how they fought gay marriage or how they treat Mexican-American's. There are pockets of safety in that state (Houston/Austin) but as a whole it's not that great.
I lived a number of years in Idaho which has the same problem. I'm "OK" in Boise (even there things can happen) but I'm genuinely concerned for my safety when I have to drive anywhere else in that state.