The nuke on japan ended a massive war, controversial but I like how you ahve to go back to before the ccp was even a thing for your arguments. There is no contest as to where people would rather live and be ruled by go ask them yourself and lets see who sides with who. The discussion about whether china is good to it's people or the world is so ridiculous I won't even comment, again I don't feel like I need to say much here let the people decide but don't try to force them or use military threats. We don't need china, russia or iran to kneel just to sit down and chill out there will be no world takeover. Russia is barely a frenemy of china anyway they would love to see china cut down to size.
In 1950, President Truman publicly stated that the use of nuclear weapons was under "active consideration" against Communist Chinese targets during the Korean War.
In 1953, President Eisenhower threatened the use of nuclear weapons to end the Korean War if the Communist Chinese refused to negotiate.
In order to support the continued existence of the Republic of China government, the United States issued several nuclear threats against the People's Republic of China in the 1950s to force the evacuation of outlying islands and the cessation of attacks against Quemoy and Matsu.
Funny how that sort of nuclear blackmail only stopped after China developed her own nuclear weapon.