I fully expect a Beslan on COTUS if the non-crazy muslim community can't or won't ferret out the kra-zees in their midst.
In that case, I sure hope parents & others nearby have CCW, because early and aggressive "right the &^^% now" response by the real "first responders" is the only way to prevent a massacre, once the attackers have time to set up.
I think it'll be a lot of SOJS or "Sudden Onset Jihad Syndrome" Like Maj. Hassan and possibly Faisal Shahzad. They gravitate to the extremist rhetoric of certain Imams, but don't coordinate (much, if at all) with anyone else.
I've been completely befuddled about the lack of Beslans, spree shooters, IED's and suicide bombers here in the U.S., until I thought up this analogy.
Imagine if you were steaming mad at say...
China. And they were engaged/involved in Canada. Would you, knowing nothing of China, where you don't speak the language, don't know the culture, don't blend in with the dominant ethnicity, or even the basics of how money, jobs, mass-transit, private transit etc. work there, much less obtaining guns and explosives through grey and black market channels, go there and try to blow up a shopping mall?
Or would you simply walk across the border into Canada, where you speak the language, they have very similar or even identical customs, and the local infrastructure will be understandable/navigable to you to try and dust it up with the Chinese.
Now say that you've got a group of other Americans backing you with money, training etc. Is now going to China to blow stuff up that much easier? Even assume there's a significant ex-pat American presence there in China with which you can try to gain a toe-hold first...
Nope. Walking to Canada is still easier.
I think the domestic people of interest who travel to the ME, and come back, or have contacts in that part of the world are the ones getting watched with a microscope. However, having lived here long enough, America becomes their own "backyard" and it's psychologically harder to set off SHTF in your own backyard.
So even amongst those who are already here, it's hard(er) to pull the trigger. Also, it's probably easier in the ME where you're more likely to see personal and state brutality every day. So that leaves the disgruntled, disaffected, and losers who latch onto Jihad more as a focus and framework for their angst and anti-social feelings, rather than as a genuine true-believer.