In countries like Afghanistan, the corruption is in your face. In Nigeria, I heard of judges making sex the bargaining chip rather than money. Now let's put that in the context of an honor-based society. Imagine that you're the brother of a woman who got raped by a judge to have her case heard in court. What do you want to do? You want to kill the judge. So here is an insurgent movement that hands you a gun. You have rage, and they give you an outlet for your rage.