And only if Truman hadn't fired McArthur.
Firstly. McArthur finished the job. Secondly, who says we aren't headed to nuclear war anyway? Nuclear war fifty years ago wouldn't have been as nasty as nuclear war today.
It would have been worse fifty years ago, actually. Because we would have been facing Soviet nuclear warheads, whereas even if we have nuclear war now, it will be only the relatively weak bombs tested by the DPRK.
I don't think the Soviets had the capability to deliver long range or quantity of nuclear weapons very early in the 50's.
Edit : The Soviets and US were pretty much just touching on the hydrogen bomb at the time.
