So, having been following the news on the Golden Dawn in Greece and the arguments between China and Japan on the Senkaku/Diaoyu islands I got to wondering if the third World War could be started by having these two issues become more dominant.
Your task is to come up with a plausible way for one of these issues to explode like a powder-keg and start the next world war. Bonus points if you can tie both issues together and make the war a huge one, involving pretty much every nation on the planet.