"Truth is one; the sages just speak of it in different ways."
"Sure, they're OK behind bars!"--A Neocon
It's not just neocons who perceive Muslims to be unassimilable. My university has a very large population of Muslims, many of whom are very "American" despite their choice of headwear. One must consider the effect of Islam and the "Muslim" elders to understand in which direction political assimilation will tend toward.
My general immigrant-related A-ha! moment came back in my bookstore days, when I realized that newcomers to our shores were flocking to the same crappy self-help books as the native-born.