FOSS and focus on privacy does that to some people, they feel superior because they worry about those things they see as being beneficial.

I’m sure many of the users from the before time were here specifically to not use a closed source, data gathering platform, so they’re a bigger proportion of users than they were on Reddit and they tolerate the most extreme elements of their community that also happen to be the most vocal.

TL;DR: Reddit is for normies and now normies are on a platform where radicals were everywhere and part of the majority before they arrived.