they have exploded thousands of the things in the atmosphere, and here we all are

a few hundred well placed more, and they could a)reduce population, b)reduce one race nations down to MUCH more manageable levels, c) remove ageing infrastructure and cities that are nothing but a drain on resources currently,(i'm sure we could all think of a few candidate cities on this one) d) create jobs for the survivors for rebuilding for decades afterwards

if you don't think they WOULD do this, you are deluding yourselves. Food is running out, and populations are exploding, worldwide.

i believe it's inevitable, and the 'protagonists' will actually all be on the same team