"sysop" is going to explain how if Mexico and Canada allowed Russia to place nuclear missiles along their boarders, pointed at the USA, it wouldn't provoke a response from the USA, because the citizens of Mexico and Canada have the right of self-determination and "the right to set their own economic or defence policy" which should not be "subjugated to the demands of a neighbouring state."

I was thinking of including Cuba along with Mexico and Canada but I think they tried that once and look what happened!