re: Truck bomb
I an repulsed by such actions but the point of the film is to compare the actions of the insurgents to past patriots.
How you or I see truck bombers is not as important as how they see themselves. They do not see themselves as cowards and there are probably ten for every truck bomber who see some nobility in that kind of insurgency, but aren't willing to sacrifice themselves.
The film is ambiguous enough to invoke feelings from both sides.