Well, that "US way" has worked better than every other developed country in that respect, why not adopt it?
Trying to credit America's success on the "US Way" is fallacious - I don't think we'd be much worse off if we were ruled by a monarchy, or even an extremely ethnically homogenous culture, since we're protected by two oceans, have massive oil and mineral and forest reserves, and had the native population decimated by infectious diseases before we moved in.
You can't ascribe the position of the US solely to its immigration policies. Especially since it's impossible to correlate immigration trends in recent years in the US to economic trends.
China.
Although I did make an error - it's both Korean and Chinese.
and buddhism isn't chinese.
So, yes, it's a Japanese Buddhist/Shinto temple. But the religion isn't originally Japanese, and neither is the architecture. The only thing native there is the Shinto.
No one considers modern Japan to not be Japanese, despite it being, in some sense, an American reboot of a Prussian remix of Imperial China. If you want to say Japanese culture predates the US by "thousands of years," fine - except you would need to ignore the thousands of years of European culture that America is based on to do so.
And also ignore the fact that, yes, modern Japanese culture is very much a product of the postwar period, making it both older than, and newer than, the US. And the aspects which are newer are likely the more relevant to Japanese people.