It has been remarked more than once that they took their time about it.
How about the terrible suffering of the people of so many countries that were part of the defeat of Nazism. Don't they count? Obviously they are children of a lesser God, or at the very least not as "exceptional" as the United States.
Do you really think that Nazism in Europe would have been defeated without the terrible sacrifice of the former Soviet Union? More than 20 million dead.
While Britain and the US were carpet bombing German cities and civilians, Russians were fighting the Nazi military machine on the ground, ultimately fatally wounding it. Without this, there would have been no D-day landings.
And no, I am not unaware of the war in Nth Africa, Italy, Greece, the pacific, IndoChina and on and on.