Well-researched, well-reasoned, and very close to my own thoughts on the matter, which are reflected here, where I argue that when you have diversity, you need an all-out effort at assimilation into one American culture in order to overcome chronic distrust that will tear any nation apart:

The Importance of Cultural Nationalism in an Era of Distrust - Quillette

And here, where in the context of a discussion of the ideas of the 18th century German philosopher Johann Gottfried von Herder, I argue that you can have diversity or you can have pluralism, but you can’t have both:

The First Cultural Relativist: Relativism, Nationalism and the Danger of Diversity