Methinks your hypotethical scenario has a big hole in it - could probably fit that proverbial camel through, actually.
Again your just complicating things. I asked a simple question, If wipping out a certain race nation or ideology would garuntee world peace forever would you favor it, Its a simple yes or no question. There are no holes in it. No maybes. No other what ifs. You wipe them out no more wars. Forever.