I think the key thing here is that the question is not about changing a single person who acts in bad faith. Indeed that may be impossible. How you act may not

I think the key thing here is that the question is not about changing a single person who acts in bad faith. Indeed that may be impossible. How you act may not have any affect on the specific person you’re engaging with, but it will have a (likely very small) affect on the community as a whole. Engage in good faith towards all and others may slowly start to act similarly. Engaged in bad faith and you may encourage others in the community to act the same way. Another important thing: you may identify 98% of bad faith actors correctly, but that’s still 2% of people acting in good faith that you’ll polarize against your cause.