What is with these psycho/sociopathic murderers?

Oh, I don't know... they're tired of us bombing their countries back into the stone age maybe?

Or maybe they're tired of us propping up brutal dictators in their countries (if they don't happen to live in the ones we are currently bombing)?

Maybe that's it.

Or maybe they're tired of us killing their women, children, and old men.

Could be any of those.