Not “Aliens”. Or “ETs”.
The Tall Whites, and Nordics, and all others, are manufactured AI beings. Apparently no original being, comes here. Except for one maybe.
So if we stop killing each other, we are helping whoever manufactured us. Assuming we are AI. But even if not AI, we are helping those who made us, and not ourselves, or even God. Well maybe ourselves, by not destroying our souls.
Also, the military makes money killing, and killing machines, why would they want that to stop?