I guess it’s the old “I’m not a racist, some of my best friends are [insert race identifier here], but…” has been around for a long time. This is just “I’m an LGBT supporter, but they shouldn’t be allowed to exist in polite society” or something.

Yup. “I don’t mind that they exist, as long as I don’t have to see them” is a shithead opinion as old as time. Sometimes it’s racist, sometimes it’s sexist, sometimes it’s classist, sometimes it’s homophobic, sometimes it’s transphobic, but it’s always the same thing. It’s 'other’ist, people looking for another group of people they can look down on and hate.

It’s a very good motivator, if you’re an unscrupulous politician looking to exploit people’s biases