Excuse me? WTF? They're not expressing anything. The bombers are confused people with no options or hope. The handlers are psychotic power hungry warlords using terrorism to get ahead in the world. War & terror are never statements, they're the wealthy (or aspiring wealthy) manipulating the hopeless and downtrodden.
Now, here I have to correct you.
Most of these terrorists are actually Middle-class, literate people. Not wealthy, no, but they are certainly not without options.
Moving to a more prosperous place, one less violent IS a choice, also.
One they choose not to take.
Sam Kinnison once said about the Ethiopians, and while it is harsh, it is true.
What is this, pantomiming scooping up the soil
SAND
What will it be in a thousand years?
SAND!
If the conditions are horrific, change them. If you can't, change the location. I live in Oklahoma. When the dustbowl destroyed this area, most people moved.