Seems like a recipe for creating a lot of people with very little or nothing to lose.

Nah, I think the real danger is when they find others who re-affirm their convictions.

You are advocating isolating, deplatforming, etc.. These are tactics that hurt. Hurt people hurt people. If people are allowed to be heard and socialize, they gain happiness and are less likely to hurt people.

Really? You can't think of any isolated groups or individuals who have wrecked hell with bombs, guns, virii, etc? Or nukes for that matter.

They are not isolated from each other, they are just detached from those who don't what to hear them.

Imagine that you have a piece of rotting meat. It's unsightly and it stinks. So you hide it under the carpet. Now it's gone from view, and the smell is nearly gone. But it's still rotting down there, and at one moment you'll have to face what it will turn into.

Your analogy fails for me because the rotting meat you refer to are free people. You speak of these people as if they should be controlled. Where is the room for their inalienable rights?