I would tend to disagree.
The probable result of FDR refusing to accomodate the Soviets would most likely have been a hot war in the 1940s rather than a Col War lasting 45 years.
While the Cold War and the subjugation of eastern Europe were Bad Things, they were not necessarily worse than a real World War III fought across the corpse of western Europe.
Personally, I don’t think FDR was a traitor in the sense that someone like Harry Dexter White or Alger Hiss were traitors.
I have always felt FDR was an ignorant, arrogant liberal SOB who planted the seeds of our financial and social destruction years later through his erroneous and flawed views of what role government should have in the personal lives of the electorate.
That he surrounded himself with liberals socialists and communists (the New Dealers were often all three) is just another strike against him in my book.