Some have actually speculated that this type of 'multiculturalism' is precisely what made Rome internally weak and no longer able to hold off the Barbarians. Roman Legions lost their internal cohension or that which had defined them as being a 'Roman'. It appears that once again the more things have changed the more they have stayed the same. So the West has a weakness and the Barbarians are exploiting it.
The Left continues to follow the dictates of Karl Marx..."a people without a heritage are easily persuaded." Under the guise of multiculturalism, the Left is destroying our unique American culture in order to replace it with their own socialist utopia.
When you have a people with no particular allegiance it becomes that much more easier to manipulate them. And it isn't a coincidence that the Left is doing just this, when you see how they not only ignore America's fine attributes, they attack and demean everything from the Constitution to our Founders.
From the attack on G-d to the removal and renaming of public schools, the Left is doing its best to erase our common history; and a people with no history, have no future. Whether it's multiculturalism, tolerance or diversity...these are all code for ways to disassemble our unique culture.