SO the "world" will slaughter millions instead of stop a war do to the deaths of 100's of thousands.
What world is this?..
USA won't even stick it out when terrorist kill civilians.
Hell even one of the main excuses for doing nothing is North Korea will level Seoul.
So ermm maybe but I wouldn't bet on the 'world"
That could* occur if it was a situation like WWII where the mortal survival of virtually every nation was at stake. But when its just South Korea..you can bet many nations will dump them first and fight until its over only if they can find no way to run out.