We need fewer people, period. The earth can't sustain 8 billion.
American shootings aren't revenge.
They're the national pastime.
Nobody is watching baseball with the zombie 10th inning runners and the new pizza box size bases.
Nuclear war would end up killing everyone. A nice plague with a 75% fatality rate would do it. Having a vaccine would save the smart people and see 75% of the dumbasses end up on mass graves.
The smell would be bad for a year or two. Especially around cities.