The concern isn’t that letting Nazis back on Twitter (or any other major platform) is going to make people suddenly start thinking Nazis are good. The concern is that when people get used to hearing their ideas, other extreme ideas start sounding kind of reasonable and even acceptable. That’s the Overton Window, and it explains a lot about what’s going on right now. Far-right extremists use this tactic more effectively than any other group I’ve ever seen. 3/