solarz
Brigadier
Nope, China's true enemy is Japan and not the US. I say that because at the end of the day, the US could always pack up and leave (not that we would), but Japan will always be close at hand, looking for opportunities to cause trouble. Make no mistake about it, the Third Sino-Japanese war of 1895-? never ended, and is picking up steam again. Even if China wins a decisive victory and finally ends the 3rd Sino-Japanese war in her favor, there's no guarantee Japan wouldn't start a fourth one sometime in the distant future.
China and America are learning to live with each other, and friction is natural until some kind of compromise is had. I have no doubt it'll happen, and I hope it's soon. Conversely, history has shown Japan can't live in peace with its neighbors without a hegemon standing over it, and the central question is if the US should be that hegemon or China, or both.
Note that I said "adversary", not enemy. There is a big difference between the two terms.
I do not believe China and the US want to hurt each other, but they are very much in competition for global influence.
As for Japan, like the Mongols, its window of opportunity has passed. Perhaps it will arise again sometime in the distant future, but then, so could countries like Korea, Vietnam, or India. You can't really predict the distant future, so it's rather pointless to make policies based on "ifs".
For the foreseeable future, Japan by itself is no match for China. It is only a threat because it is effectively an FOB for the US.