Completely different dynamics, IMHO.
Somewhat similar to what Wayne described, I recall an incident where an argument between Iraqi Police and Iraqi Army at a checkpoint turned into a sudden and massive expenditure of 7.62x39mm, but no one was hit. It wasn't until later that I realized that it was essentially just posturing on both sides. (if they'd been shooting with intent to hit, it might not have produced much different results, but the misses would have been closer . In my experience, there is a very strong cultural obligation towards revenge with Iraqis and other Arabs...if offended or wronged, they are obligated to do something in retribution...whether or not it produces any meaningful effect is not really the main concern.
Suicide bombers, on the other hand, are comparatively rare, and not really representative of the general population. They're either extreme religious fanatics, or often persons of diminished mental capacity that have been duped into doing the deed. Where I was, AQI had to import fanatics from outside of Iraq, because they couldn't supply themselves with enough locally. So IMHO, blowing oneself up isn't really part of the mainstream culture, at least in the places where I was.