This doesn’t surprise me that much. There are evangelical “Christians” (I put that in quotes because even though they call themselves Christians, they are anything but Christ-like) who will support anyone who is willing to demonize gay people.
To them, the only things that matter are opposing gay people, opposing abortion, and making sure that everybody has a lot of guns. And oddly, Jesus never said anything about any of these things.
And the things that Jesus DID talk about? Like loving your neighbor? Doing unto others? Not judging? That whole camel and the eye of a needle thing? Those things don’t matter, and just get derisively sneered at as “social justice”, as if that’s something contemptible.