Nuclear winter will be the end for this planet, so many people want it because then they get rid of government, globalism and things like that.
But none of those live in nature (neither do I at the moment) absolutely dependent on the system (supermarkets, electricity, no clue how to farm etc).
Besides that, the world will become a huge desert when the bombs fall, and the people surviving will have to become barbarians to survive.
It will be the "new age of men".