Not even sure that sympathetic is really the right word. “Critical support”, when it’s not just used to mean “I love bootlicking but I realize it looks bad”, means something closer to “I understand these people are bad, but I think the opposition is worse” - ie that they regard weakening America as more important than opposing the Taliban.

As such, personally, I’m not saying that this guy loves the Taliban - but that he probably means ‘critical support’ more seriously than joking.