Dated 2002, that map doesn’t even begin to relate how serious the problem is.
The muslim “cultural center” (school, mosque, compound) that I lived by was located in a small community in PA. The town was around 10k in population and over 99% of the folks were long rooted there, descended from white European immigrants from Germany, Italy, Ireland...the usual suspects.
Economic downturn led to cheap real estate and a Pakistani follower of a radical muzzy came in and bought a church and started operations.
I left, couldn’t take the agitation anymore. They finally got in trouble with the law over multiple charges of sex abuse by teachers at the school.
Point is, it’s not just in the cities. You find them in the boonies too, and they have plans for America. Be aware and be alarmed.
(Anyone wants additional info, freepmail.)
The map was not to show “how serious the problem is” .. but how we already knew in 2002 about these groups and we have done nothing. Of course, since we have done NOTHING they have only increased in size.