I think it is a mistake to think that free speech absolutists are evil people. Their position is that bad ideas are better fought and ridiculed in public space, and forbidding them is counterproductive because it breeds conspiracy theories and removes ability to show in discussion why the idea is bad.
I do not want to discuss if it is right idea or wrong - it is irrelevant to my main point. This idea is supported because a person think it the best idea for everyone, that is not because the person is malicious.