Just don’t do it.
Try to explain a conspirator with facts why he is wrong. Instead of believing facts he will hate you. It is impossible to change the mindset of those people, so never try it, just evade the discussion, or tell them how you lost all respect for them since they ignore facts and hate you for knowing more than them and that this is a very bad character, if they still hate you, and they will, just say I don’t want to talk to you. You can next everyone till you find someone worth talking to.