I should not be involved with people who turn a blind eye to fascism.

Full stop.

I’m sorry to say that you already know what you have to do. There’s no easy way to do it other than to just do it. If it makes the process easier, you don’t have to pose it as “it’s me or them” because you already know what his answer will be. If he was going to change, he’s had plenty of opportunities already.

Don’t wait for him anymore. Live YOUR life.