

Yes, you shut them down. That doesn’t require you to dehumanize them. Someone inciting violence against a minority group for example would also be banned I’m sure. The paradox of tolerance is simply solved by limiting the freedom of the intolerant. There are plenty of ways to do that without pretending the offender isn’t human. Honestly, resorting to that line of thinking is very much what Nazis do.
Well yeah, subjective honesty is useful in a lot of social interactions. But this isn’t lying to your boss or teacher or whatever. This is lying to your therapist. They have very little authority over you and an official interest in your wellbeing. It might be a good idea to lie if you are actually a suicide risk and don’t want to get institutionalized or if you are actively planning a crime which isn’t covered by confidentiality. But otherwise, you’re hurting yourself by not letting them effectively work on your problems.