The only genuine nationalism in the US comes from the Native Americans.
The native americans and amish are the only groups in the US allowed to be separatists, and they're a small portion of the population so their variety of nationalism doesn't represent what nationalism means in the US. Separatist forms nationalism place value on preserving the uniqueness of a specific group by means of separation. Civic nationalism places value on preserving the freedoms and rights of a nation's citizenship. Nationalists in the US are people who place value the founding principles of the United States, and appose government actions which conflict with those principles and oppress the republic for which it stands. As said before, Nationalism in the US doesn't seem to mean the same thing as some other places.
The Native Americans had their country stolen from them pretty much via genocide. For the Europeans to be nationalists in the US is just a joke.
That's because you seem to only accept one meaning for nationalism. This does not discount the fact there are multiple forms of nationalism, nor discount what nationalism means in the US today. The concept of civic nationalism is distinct from all other forms of nationalism because it applies to a citizenship, regardless of their individual ethnicity or family origin. Americans will never be allowed to live down the Indians or slavery, just like the Germans will never be allowed to live down the Jews. Their descendants will carry those burdens for as long as people insist they do. Calling US citizens Europeans is absurd.
I know, I already acknowledged plastic nationalism. Your argument is along the lines of a squatter defending the homes they stole, or a bunch of squatters from different countries defending the home they stole, which isn't really quite the same as the home owner defending their homes. Americans will never be able to live down slavery because the Europeans constantly have guilt pumped into them by the Zio Joo elite, same with Germans, hence why they end up doing cartwheels and cheering when a million Africans and Arabs pour into their country. And you prove the point by just mentioning "the Joooz". Germans slaughtered the disabled, Soviets and Gypsies too.