Well, no. FDR deliberately surrounded himself with Communist agents. And it was obvious to the dullest eye what kind of guy Stalin was.
Yes, Obama is deliberately betraying everything our country stands for. He is on the side of evil. But so, I'm afraid, was FDR. Send tens of millions of allies and innocents to the Death Camps? No Problem!
No need to make FDR look better than he was just to make Obama look worse. Obama is incredibly evil. Period.
And Churchill minced no words in saying so, to FDR and others.
Roosevelt was very ill at Yalta, and his judgment may well have been affected ... but he very consciously acted as he did, for post-war geopolitical reasons. He realized, correctly, that the US and USSR would be the de facto rulers of the post-world, and he was determined to deal with them on that basis.
He was wrong in his approach, of course -- and Churchill correctly predicted the consequences. Thankfully, Truman responded correctly when Stalin's ambitions became obvious.