Problem is going nuclear could destroy both china and russia just from radioactive material sweeping through both countrys.
The US didnt interfere in the World Wars very much at all because politicans don’t want to fight a enemy they can lose against.
Um–“The US didnt interfere in the World Wars very much at all”? Huh? We didn’t? Or do you mean that the two times we saved the world from the Evil Hun and the Inscrutable Oriental and made the world safe for democracy, it was with one hand tied behind our back, hence “not very much interference”?