The historical population in America is European so I don’t see what the commonality is with Mexicans. Ever heard of the Mexican-American war? Whether it’s Muslims or Hispanics, the outcome will be the same and that will either be civil war, balkanization or the US dividing into different nations the way the Soviet Union did 20 years ago.
Europe decided to import muslims. Who have none of those characteristics. Mexicans have some of the same values as the Anglo-sphere, muslims are almost total aliens. Now I am not saying the importation of vast numbers of Hispanics was good, but then there is a strong line of thought that letting my people (Saxons/Germans) immigrate in was the end of the Republic. But neither caused as much problems and the Algerians in France.