Ummm... During the ice age, did humanity have any literal lunatics in charge of any weapons of mass destruction, capable of wiping out entire cities at the pus

Ummm... During the ice age, did humanity have any literal lunatics in charge of any weapons of mass destruction, capable of wiping out entire cities at the push of a button? Weapons that could alter the state of natural weather systems? Weapons that could unleash diseases or poisons on global scales? Sure, humans have survived nature in the past, but this is humans with really deadly technology this time around. Even if we survive this, what's the stupidity of warmongers with those sorts of weapons gonna do to the world during the ensuing chaos? Will it be a world worth living in anymore, or will we wish we'd died with the rest?