It would be one thing if that was what their intent was, they were simply trying to find a way to blame america for something. They were downgrading the united states for everything we stand for.
What part of those sentiments is wrong? The USA wasn't terribly concerned about the Holocaust. They were more concerned about winning the war.
They knew where the concentration camps were, they knew where the creamatoria were yet FDR didn't allow our pilots to take out the train tracks leading to the camps for fear it would play into Hitler's anti-Semitic propaganda machine. They wouldn't even allow the pilots to take out the creamatorium ovens. The Jews have a right to tinge their gratitude with anger at the US because we could have done more to save Jewish lives BEFORE liberation and we didn't.
FDR and the USA could have sided with the angels by trying ot prevent Jews from ended up in these camps but we didn't.