I wanted to add three extending ruminations, which make sense after you read the essay.
Firstly, that integration often happens by exclusion: Pop culture has integrated black Americans as leaders and heroes in part by the way of new enemies (now Arabs are quintessentially un-American, and so "all" Americans join up to fight their evil: Black and white Americans, together, even Latinos, though rarely in America is such integration so easy or so successful as it is portrayed in action movies to be.) Who will be the new enemy that allows Arabs and Muslims to integrate? (I mean this half-jokingly, because too often, this is how it happens: The civil rights movement may never have happened the way it did without the threat of a global Communism.)
Secondly, that previous immigrant groups found it easier to integrate, to get a piece of the pie, because the pie kept expanding. With new economic powers talking back to America -- or, and this is more significant, simply deciding their own path, see Brazil or China for example -- the pie is apparently not growing fast enough (the same can be said of the global economic crisis). In that climate of stagnation, it's harder to simply make a living alongside everyone; this is something Latinos, when they are demonized, know all too well unfortunately. Will it be harder for Muslims to feel fully integrated when the wider environment does not seem conducive to that, and we are marked, in an ever more connected age (see third point), by what others sharing our faith do in different contexts and countries?
Thirdly, it's easier for Muslims to self-isolate, and self-segregate, because of the internet, satellite TV and the like. With blogs, al-Jazeera, twitter, digital media, podcasts, online sermons and movies, we can create alternate environments to get news and ideas alongside consuming the lightest fare from pop culture, which rarely makes civic or intellectual demands of people. You can live side by side with people, but be sustained by other media (and other groups and minorities can do this, will do this and are doing this in places like Europe among others.) Why go through the hassle of integration, or write angry letters to FOX, when you can just tune out? Why hear the other side out? Who cares what Democrats or Republicans think, when media is diversified to you and your group?