Thinking about it now, heterophobia is kind of like gatekeeping for the LGBT community. Not saying all people of pride that, but all examples I can think of are members of (and sometimes outside) the LGBT community who will disregard the opinions of others for being cis white.
"I’m entirely fine with straight jokes. It’s just, y’know, Twitter users perceive gays, bis, pans, etc as complete saints and will see lay down their pitchforks against them. As such, some people will go overboard with being an SJW with LGBT respect"