True. Demographics is destiny. Dennis Prager, and many other Professional Conservatives, keep harping on "values." They think (or at least claim to think) that people are interchangeable. Give differing peoples the same values and Constitutional freedoms, and they'll turn out the same.
Yet after it was established in the early 19th century, Liberia adopted the U.S. Constitution as its own. But Liberia never evolved as did the U.S. No Liberian space program. Liberia remained indistinguishable from its African neighbors.
The Constitution and our form of government only works for a 'virtuous' people. That's why it's collapsing now that the less than virtuous have the reigns.