This seems perfectly sane and fair to me. Indeed, it seems like the only realistic option. Don't bring political debates to work. If they show up in the course

This seems perfectly sane and fair to me. Indeed, it seems like the only realistic option. Don't bring political debates to work. If they show up in the course of business, handle them carefully, but for the love of god do not borrow trouble by abetting them. For those looking for a place where people argue about politics, I'd politely refer them to literally everywhere else in the world right now.