So, people resent being treated like animals. This is some profound insight?
Being forced to act irrationally, particularly through demands from strangers, is something most people will not tolerate much longer. My response to such a command takes the form of a no-nonsense statement while maintaining no-nonsense eye contact: "You can no more force me to put on a mask than I can force you to stop acting like a bully."
If the bully persists and demands I obey them or leave, as I turn to go I say: "You need to know that I have as much contempt for you wearing a mask as you do for me for not wearing one, you bully (or punk; whatever)."