Then there are the rising millions of Muslims in Europe who are not assimilating, as Catholic Irish and Catholic Germans did in a Protestant USA, but are replicating within the West the countries and cultures whence they came. They are separating themselves, by ethnicity, culture and faith, from the Western societies into which they have migrated.
Puerto Ricans, Mexicans, Dominicans, Somalis and Arabs in America also build replicas of the countries and cultures whence they came. Thus, we take on the aspect of an empire. And empires fall apart.
The melting pot, rejected by our elites as an instrument of nativist bigots, is history.
Libya, Syria and Iraq are coming apart, as did Sudan and Ethiopia. The Kurds seek to carve a nation out of Turkey, Iran, Iraq and Syria. A Sunni-Shia sectarian war impends.
Christians are being persecuted, martyred and expelled from Islamic nations. In Myanmar, Muslims are brutalized by Buddhists. In Western China, ethnic Uighurs resort to terrorism in a war of secession to establish a new East Turkestan.
Disintegration, separatism and secessionism, for racial, religious, and cultural causes, are a phenomenon common now to Europe, Africa, the Middle East and Asia. Are we somehow immune?
The world is boiling with racial, tribal, cultural and moral conflict. People carry in their hearts the seeds of these conflicts. The notion that they will come here and be converted into Ozzie-and-Harriet Americans may be a bit utopian.
America is becoming a microcosm of a world on fire.
Why are we doing this? Why are we inviting the world into the USA? Was there some grievous flaw in the America of Ike and JFK that must be expunged? Some sin for which we must do penance?
What is coming is predictable, and has been predicted.
By 2042, Americans of European ancestry will be a minority in a country built by Europeans. "Anglos" are now a minority in California, New Mexico and Texas. Hispanics will soon be the majority in all four border states with Mexico.
And should Hispanics decide not to give their electoral votes to any presidential candidate who does not promise to erase the border with Latin America, that would mean the end of the United States as we know it.
Americans are already deep in a culture war over morality -- marijuana, abortion, same-sex marriage. We are already racially polarized over affirmative action and income inequality.
And when we have ceased to be an English-speaking, Christian country and become instead an Asian-Hispanic-African-American-white nation, with large Jewish, Christian, Muslim, Hindu, Buddhist, agnostic and atheist minorities, and no defined borders, or common faith and culture, what holds us together?
And when did we vote for this future?