My theory is society has a suppressing affect on these things… It’s not nice to be a nazi, or to mistreat people you don’t like, so these things get hidden.

Algorithms do the opposite. Now someone with Nazi tendencies is surrounded by them and encouraged. Posts hating trans people get pushed by algorithms because they drive engagement (even if all the initial responses are negative, it’s still engagement to the algorithm, which will then boost the ‘popular’ post).

Things like lemmy and mastodon don’t do that and end up nicer places as a result.