They whipped the Nazis; you’re sarcasm is not helpful.
"They"?
I believe there were a lot of American Troops who would say they helped. I would also say that there were a lot of Russian Soldiers who also helped. 'They' would not have been able to do it by themselves.
Also, it is a mock of their immigration laws. Which, if you and I do not learn a lesson from Londonistan and Paristan, we will see New Yorkastan.