> That's why the best course of action is to not censor at all and allow the system to work itself out.

I disagree with this sentiment, and upon reflection of why, it seems we've come to a real-life example of the trolly problem. Choosing to be passive and "let the system sort itself out" will almost certainly result in more deaths (edit: specifically in terms of mass shootings), but choosing to be active means the powers that be are forced to make subjective choices. I personally believe that it's worth taking on the responsibility of subjective choice.

Edit: However, I also realize that censorship oftentimes just ostracizes already-radical groups. This has the advantage of making it harder for them to find an audience, but also allows them to radicalize further while under less scrutiny, which also seems like a complicated balance to me.