First of all, on Reddit I rarely ran into right wing extremists. Do you know who I ran into a LOT? Left wing extremists. That is what tends to happen when you start polarizing discussions (both sides) and then kick out one side. The other side just becomes an echo chamber.
Second of all, this is not a problem you can ignore. Its not as if these people just magically disappear into thin air once you ban them. You can’t deplatform them because they’ll just go to another place. Where will they go? To their own moderated places, which will allow much more extreme discussions, leading to more and more polarization and problems in the real world. I think part of the problem here is that we (collectively) stopped listening to people in minor disagreements, and instead of having reasoned arguments, just kicked these people out to the curb. I honestly think that that sort of behavior from the left side of the spectrum is what fueled US polarization which culminated in Donald Trump becoming president.
You may not want to have reasoned discussions with people who are more on the right side of your political spectrum, but you HAVE to. We all have to because if we don’t, they will talk only amongst themselves and they will only fall deeper and deeper into their right wing pit. Have no illusion, the same goes for left wing extremism. Extremism on that end might still be milder, but its there alright.
I’d rather have a group of people with a few minor-and-controllable nutcases in it than a conform-with-the-rules group, and a group of dangerous terrorists outside that group.