At one point people will break and kill them/put them on trial. There's only so much people can bear.

The point however, is that this will ALWAYS come too late.

Everything else you said is correct, but you always have to remember these people are no more capable than a tapeworm. This means whatever set in by them will break down inevitably because it's built on sheer body counts. You look at the Pol Pot Genocide, you look at Eastern Germany, you look at the tyrants of Ancient China (Before Christ). Same thing.

It will be no New World Order of the Ages, but a New World Order of the Moment.