it's always good to consider people's words and feelings in the context of material facts, things that can be meassured objectively, like, for instance, counting dead bodies.
Well unless you have specific evidence, that seems to be a reality we don't live in, so not really something we need to worry about. The point of the GP was to point out the power differential. That seems to remain the consant even in your hypothetical world.
1. ban people for threatening violence
2. what if both sides are?
3. then consider which side is killing people
4. count up how many people each side is killing, and only ban sides with a large number
and that's what doesn't make sense to me.