The problem with today’s multiculturalism is that it is different than pluralism. Pluralism is the proper ethos for America, multiculturalism is not. The difference can be explained simply by assuming Americans can be divided into two tribes:
Ideological Tribe A
We believe that America is at its best when its mainstream is maintained without regard to race, creed, color, sexual preference, etc.
Ideological Tribe B
We believe that America is at its best when its mainstream is maintained with special regard to race, creed, color, sexual preference, etc.
I could go on at length to describe the nefarious notions that are sustained in the American Culture Wars, begun in the late 50s taking shape in the 60s and blossoming in the 90s, but the distinction above nails it. What’s important is that multiculturalism is now clearly showing its philosophical weakness and that ordinary people are recognizing it.