That's not a bad idea, but not niggers in general, just the criminals. Literally deport them all to a prison society, where they live with other criminals only, for life, with humane conditions - just isolated from the peaceful world.
There if they attack and kill each other, at least its other criminals who earned there place in the prison society.
Your take is actually right on point dude, except for the generalization to all niggers. Many are not criminal, this is obvious. And I didn't used to believe in the death penalty until I watched that girl get murdered on the subway by a 14-arrest man.