Your scenario simply does not work within the constraints of OTL. If you're fine with it going into ASB territory, then the thread can be moved to its correct location on this forum. While some threads/ideas turn out to not be possible, you can discuss the reasons as to why in length, since they aren't so "out their" that it would require many large changes (or one pretty much impossible change) to have occurred. This scenario is outright impossible unless you do one pretty much impossible change.
No need for passive aggressive or aggressive posts by anyone,getting salty happens, but don't get into an online fight. Not worth your time and energy.
The only way for this to happen would be with WWIII, how that happens is anyone's guess. In 1950, the U.S/allies could nuke the Soviet Union into the ground if they so wanted, as the Soviets only had five-ten war-heads operational, compared to the nearly 400 the U.S had. Outside of that, only theories.