Honestly, would you have done things differently, if you were Churchill or FDR?
In the 20th century we had already gone through a war so terrible it was called the war to end all wars, until 20 years later when we made it look small by comparison. The deaths in WW2 accounted for 3% of the entire population of the world. And we hadn't even invented the atomic bomb until the very end.
After WW2 we were on the precipice of the next war potentially eliminating the human race. I can see why we were reluctant to jump into it all over again by "battling evil" and forcing Russia to give back the territory they took from Germany.
Their choice was entirely reasonable. War is rarely the right answer.
It's just kind of silly to portray the American military as "standing up to Stalin" because Americans are taught Stalin equals evil and America equals good and ipso facto America must have stood up to Stalin.
I think the west did a pretty good job of standing up to Stalin as much as they could without actually igniting WW3. The cold war ended without any direct conflict between belligerents after all, and the soviet union fell.
That is, if you take as a constraint that you don't actually want to start an all-out war, the post-WW2 west stood up to Stalin in probably the best way it possibly could have.
In the 20th century we had already gone through a war so terrible it was called the war to end all wars, until 20 years later when we made it look small by comparison. The deaths in WW2 accounted for 3% of the entire population of the world. And we hadn't even invented the atomic bomb until the very end.
After WW2 we were on the precipice of the next war potentially eliminating the human race. I can see why we were reluctant to jump into it all over again by "battling evil" and forcing Russia to give back the territory they took from Germany.