CULTURAL ENRICHMENT: The Troubling Math of Muslim Migration. “Dearborn, Mich., is home to just under 100,000 people, about 40 percent of whom are Muslim. In 2013, a leaked government document revealed that more people from Dearborn were on the federal terrorist watch list than from any other city except New York.”

Suggesting a correlation between the number of Muslims in the country and the incidence of radicalism is, of course, considered insensitive, if not downright “Islamophobic.”

But the only point here is a mathematical one: Whatever the percentage of Muslims who support or would ever consider supporting jihadism, the raw number obviously increases along with the total number of Muslims. One percent of 10 million is much larger than 1 percent of 1 million. The questions is, at what point does the radical population achieve a kind of critical mass? . . .

The most obvious prophylactic would be to simply reduce the numbers of immigrants permitted from Muslim-majority countries.

EDIT: Related: Dearborn No-Go Zone: Where Islam Rules and Christians Are Stoned.