10th Century Byzantine Emperor Constantine VII wrote the following:
For each nation has different customs and divergent laws and institutions, and should consolidate those things that are proper to it, and should form and develop out of the same nation the associations for the fusion of its life. For just as each animal mates with its own tribe, so it is right that each nation should marry and cohabit not with those of other race and tongue but of the same tribe and speech. For hence arise naturally harmony of thought and intercourse among one another and friendly converse and living together; but alien customs and divergent laws are likely on the contrary to engender enmities and quarrels and hatreds and broils, which tend to beget not friendship and association but spite and division.
A nation, state, city or neighborhood are only made up of the people who live in it. We can not expect to import people with alien values (and on top of that telling them NOT to assimilate) and expect for this nation to continue as we have known it. It is perfectly fine for various peoples, ethnicities, races, etc to disagree on how a society should be organized. THAT’S WHAT DIFFERENT COUNTRIES ARE FOR.
So the result of seeing so many divergent cultures within close proximity of each is generations of war. See: Syria, Iraq, Libya, Yemen, Somalia, and many parts of sub Saharan Africa. Yet, we are importing this trouble into our nation.
However, as a result of importing so many of these people into our nation, our elites tell us that we need a spy state to watch over the nation to keep us safe. Why import them in the first place?