Thanks to the Left: Balkanization, Tribalism, Civil War

For more than two centuries, individuals with diverse backgrounds have come together to form a national ‘melting pot’ and harmonious society sustained by allegiance to the country and its founding principles. But today’s open-ended mass migration, coupled with the destructive influences of biculturalism, multiculturalism, bilingualism, multilingualism, dual citizenship, and affirmative action, have combined to form the building blocks of a different kind of society—where aliens are taught to hold tightly to their former cultures and languages, balkanization grows, antagonism and conflict are aroused, and victimhood is claimed at perceived slights. If a nation does not show and teach respect for its own identity, principles, and institutions, that corrosive attitude is conveyed to the rest of the world, including newly arriving aliens. And if this is unchecked, the nation will ultimately cease to exist.
Mark Levin, Liberty and Tyranny: A Conservative Manifesto, (New York: Threshold Editions, 2009), pp. 160-161.  Here.