If my co-worker is donating to Trump, and talking about kicking foreign workers out of America, they're literally talking about kicking ME out of the country. They're donating money to a politician who wants to make my life harder, and make my visa process less pleasant.
I can tolerate my co-worker all day, but if they're working to make my life less pleasant and workable, they're going to feel some chill.
Sorry you're eating alone conservatives, but you're working at a place with thousands of foreign co-workers, what did you think was going to happen?