From a blog comment:
Multiculturalism doesn’t work, no matter what ethnic group are involved; it’s not the fault of the ethnic groups but multiculturalism that multiculturalism doesn’t work.
Therefore, the Nanny/Police State is gonna force it on you, because many people are still resisting it, like they resist other forms of state control that are based in unrealistic suppositions.
Multiculturalism, or multi-ethnicism, is an excuse for importing people from other nations.
This is the intersection of groups that want multiculturalism.
To everyone else, especially those who read history, it makes sense to have a nation of people pulling in roughly the same direction:
That’s how you get a stable society. People who are upset with our current society, or upset at themselves, or simply jockeying for power, are willing to sacrifice a stable society for their own needs.
That is why multiculturalism is the new taboo, and criticism of it is “bad” in the same way Satan, Stalin and nerve gas are “bad.”
Of course, history shows us that we’re not the first civilization to go this way. The Greeks observed how once a nation became a trading mecca and had naval power, it inevitably began to include a motley group, and eventually collapsed.