They just throw around words with no regard to their meaning. It's part of their gas-lighting DARVO strategy. If you call them out on their homophobia, they'll just deny it and call you transphobic and homophobic instead. But they have no say in what is or isn't homophobic, because they aren't gay and they don't experience homophobia. This is the same subreddit where they get euphoric over getting called the f-slur or giving each other "the f-slur pass" because it validates their identity.