That post was at least 50% longer than necessary to make its point. There's no way that I would even try to respond to such a wall of text - and I agree with the conclusion of that particular post (Anyone who thinks the debate word "tribalism" refers to the practice of ancient tribes instead of in-group / out-groupism is deeply confused about history).

But again, there's no way I'm going to write an email to say essentially "I agree with the conclusion of the tribalism post, but do you really think anyone interesting to read is actually making that mistake?"