That isn’t true anymore. Many Western European countries have more immigrants per capita than the states. We aren’t as exceptional as we think we are, just inept.
1) Agreed. I specifically used the word "historically" to indicate that it has been the case in the past, but is not necessarily the case going forward.
2) Unmentioned, but sort of obvious, is that the immigration groups that Europe is adding aren't necessarily the same ones that the United States has. There can be significant differences in how different cultural groups react to different situations so the comparison between America/Europe is still much more complex than just saying "both groups have diversity now so they should be alike in every way".
