Lesbians Like Me Joined Forces with Conservatives. Now They’re Turning on Us.
(www.queermajority.com)
It could be a lot of things. I have learned that with how the world works there is no one single answer for why people do the things they do. So yeah, it could be ignorance as I suggested, a power grab/sense of belonging like you suggest, and/or something else entirely.
I also think people like this person in the article gets wha they deserve, regardless of why they are the way they are.