Adapting to a host society is practical prerequisite for any kind of success. "Assimilation", on the other hand, is not a valid moral imperative. What immigrant owes to society is the same as what the local does: obey the laws, pay for your food with legitimately-obtained funds. And enjoy all the freedoms America so generously offers (freedom of speech, religion, and political organization among them). America was built around ideals of pluralism. William Penn's practice of religious tolerance as the ruler of a colony was, for a religious person, already more radical idea than mere cultural (let's be honest: racial) diversity for a modern man. Ditto the Bill of Rights. So maybe, just maybe, those who try to import discredited European blood-and-soil rhetoric should maybe go and adapt to America. Also, notion that "unassimilated masses" of predominantly Catholic Hispanics are a "threat to Western Civilisation" is ludicrous. And btw: yeah, they were here more or less forever. Want to help them "assimilate"? Stop resisting "amnesty".