If they're so bent on dying for their faith, why do they keep hiding like wimps?
In general? Because it's asymmetrical warfare. No point in standing in the open and being "brave" if a UAV just takes you out with a Hellfire.
I don't have to like it, but it's logical.
OTOH, in the actual specific instances of when they're cornered, and you might as well live your credo and go down shooting, there seems to be a lot of "bark and no bite" inherent in ME cultures. The threats, the lying, the bravado, paranoia, and distrust of everyone, even your own "people" that are endemic in the culture also has a flip side of personal cowardice.