It wouldnt cause world war 3, if anything because the scum we would be curing off the face f the earth dont have the means with which to wage a world war.

If anything itd be like shooting fish in a barrel, and save your morality, its boring. I dont give a shit about YOUR ethics, and I dont know why you would think anyone would. We all have our own moral codes and ethics and one of mine is this: When someone starts killing your family (people, gorup, friends race whatever) its time to even the score, if not one up them so they cant come back to do it again.