The variety of local extremism pushing against the global status quo--nation state etc is strange. I wonder if linking extremists ala "War on Terror" is helpful or not. Seriously, I tend to prefer taking on extremists on a case by case basis--more police actions less military interventions, but the broadness of these movements--local yet popping up in many locations--makes me just wonder how all of this should be thought about.
If we lump all islamic extremists/practitioners of terror together and deal with them the same we loose the advantage of being able to play them off of one another and give them a nation state like status. Any action any where can fall under the banner of Bin Laden, he becomes prime minister of terror.
On the other hand the global nature of this thing does indicate that what is going on is not just a bunch of local grievances being expressed through violence.
A few thoughts. Fewer answers.