Behind Closed Doors

I haven't written here for a long time but I now feel compelled to as I have recently finished reading a book called "World War 2 Behind Closed Doors". It was the book of the recent BBC documentary of the same name and was quite an enjoyable and enlightening read as it is the first time I have read something that details the political alliance between Stalin, Churchill, and Roosevelt.
I sometimes get the impression that the second world war, and also with the first, was simply an ideological conflict between forces of good (the allies) and evil (the axis).
As I read further into the book I became aware that thinking of the opposing forces in black and white was far too simplistic. In order to defeat Germany; Britain and America had to align themselves with someone who was at least as evil as Hitler and maybe it was only because he was an even bigger bastard that he won. The constant back tracking and concessions made by Churchill and Roosevelt alluded to the fact that they knew they stood no chance against the Red Army and were simply trying to contain and appease Stalin as best they could. The number and severity of atrocities committed to not only their conquered foes but also their own people were, in my opinion, at least equal to that of the Nazi's.
Realising this has given a bit more of an understanding of my own grandparents reluctance to entertain any notion of victory celebrations. Why celebrate when all you've done is taken on an even greater problem?