I haven't got a Reddit account, but I've "lurked" there often enough, usually reading about technical things, which don't attract a lot of acrimony, except for angry outbursts at Microsoft etc., which is forgiveable. I've also seen a bit of stuff about politics and general matters, but I've not seen any serious anger there and they don't seem to get very personal, they just lampoon everything in sight, which I often find amusing in a Beavis And Butthead kind of way. But I guess it depends where you go.
It seems to be human nature for a homogenous group to attack individuals who say things that aren't in line with their views, especially if it's politics or religion.
Incidentally, I always use this kind of private front-end to Reddit:
https://libreddit.kavin.rocks/
I presume from the fact that somebody's bothered to create it, that Reddit is harvesting everything we look at and say there. And in my case, Reddit doesn't like my security and privacy plugins, and shows nothing at all unless I disable them, while the front-end just lets me in. You'd probably need a plugin such as Privacy Redirect to automatically switch ordinary Reddit URLs to private ones.