Not even that the arts have more gay people, but people involved in the arts are much more likely to be accepting and fair to gay people. So they want to hurt these people too. This is maybe overused but I think it’s appropriate and I think about it a lot:
First they came for the socialists, and I did not speak out—because I was not a socialist.
Then they came for the trade unionists, and I did not speak out—because I was not a trade unionist.
Then they came for the Jews, and I did not speak out—because I was not a Jew.
Then they came for me—and there was no one left to speak for me.
—Martin Niemöller
This guy originally supported Hitler. He said this after the war.