Earlier quoted context omitted.
When his "moral stance" directly affects your own quality of life and standing as a US citizen then it's probably more than just fashion, hm?
Well no, he has the exact same rights as any other citizen to vote and donate for whatever laws he prefers. It's inappropriate to do various things that hurt people around you; but it's perfectly fine to vote and support laws that directly affect quality of life of people in both directions (surprise - pretty much all laws/propositions do!). It's exactly the same as boycotting a company because CEO belongs to a reall…
So there would be no or little recourse, much less voting.