So if you were a smart Japanese or South Korean strategist and you believed that China was probably your most serious long-term security challenge, you'd be looking to mend fences with other countries and especially with each other. Not only would this allow you to concentrate more attention on China, it would increase the odds that China would face cohesive opposition if it tried to throw its weight around in the future. If done adroitly, that possibility might have a sobering effect on Chinese calculations, thereby stabilizing East Asia for everyone.
Yet this is precisely what Japan and South Korea are NOT doing. To the contrary: at the same time that Japan is having an increasingly ugly spat with China over the Senkaku/Daioyu islands,Japan and South Korea are also engaged in an intermittently heated quarrel over theTakeshima/Dokdo islands, a different and equally insignificant pile of rocks
I don't know whose claim to these little chunks of land is more deserving and I certainly wouldn't try to arbitrate it here. But it is hard to read about these disputes -- and especially the flap between South Korea and Japan -- without concluding that these two states are letting national pride cloud their thinking in a most unproductive way. And one big reason might be the long habit of expecting Uncle Sam to take care of their security for them.