"Go back to Europe colonizer!"

So I was watching this protest where La Raza which is a Mexican nationalist group that wants to take the entire southwest of the United States, cleanse it of the white people and found a new country called Aztlan (because they've run their own country Mexico into the ground.) Anyways one of them were holding a sign that said, "Go back to Europe! Illegal immigrants since 1492."  The point being that the Mestizo Mexicans are of (part) indigenous American descent and thus are Native to the continent thus making white people the invaders and illegal immigrants (even though their native ancestors never stepped foot in what is now the United States.) Amusingly a white man retorted, "maybe when I go back to Europe I'll drop you off in Spain!" Anyways, La Raza stupidity aside this does bring up a point that should be considered. Technically, Americans, Australians, New Zealanders, Canadians, many Latin Americans, all of those blacks in the Caribbean and in America are squatting on stolen land. Maybe us white people in the United States (and everybody who isn't native) should go back to the countries for which we came from. Lord knows that the Europeans could sure use some American values of God and liberty and it would do a great deal to help with the demographic displacement in these countries by Muslims. Anyways besides the feasibility of it all do you think that people should go back to their native lands? I think that an infusion of Americans would do nothing but good for Europe personally but I wouldn't want African Americans to suffer in Africa so I don't know...