Let us assume that they are correct for the sake of argument.
What they are admitting, in effect, is that the nations of the European Union now owe their independence and freedom to the United States of America.
Without the involvement of the United States, what is now the European Union would today still be under the domination of either the Third Reich or the still existing Soviet Union as the Soviet Union would have otherwise "liberated" all of Western Europe either to the Pyrenees or to the Portuguese Atlantic coast.
But then if a frog had wings...
I've tried to make that point. You know how hard it is to try to reason with people that think that the latter would have been a good thing?