MOAB dropped on ISIS was 10 tones and a nuclear warhead with destructive power of 50KT means a 50,000 tones MOAB.
Lets kill all 1B+ Chinese and North Koreans Russians, Iranians and all the Arabs and in general all the third world countries then what?
Assuming you lived 90 years happily ever after but then what? total blackness and nothing else right? if so then kill yourself so you don't have to tolerate such a world.
I think that you understand that if it had not been for the world community, it has long since been dropped on the idyl all that can be discarded. But everyone wants to kill humanely.