Convos - self hosted web based client written in Perl of all things, because it’s small, simple, does exactly what I want and no more, and avoids my having to faff with client + bouncer which was getting old 10 years ago and feels positively withering now.
I won’t moralize because that never stopped anyone from doing anything, ever :)
What I will say is, with the vastness of the internet available to me, I would not personally choose to sift through the reams of malice and hate to find the useful grains that no doubt exist, buried.
Plenty of other permissive fora where even somewhat radical ideas can be expressed but without the embrace of genocide, Neo-Nazism and rape.