Their killing abilities are somewhat limited, it would seem, and depend greatly on the victim's ability to resist. They whine when faced with an armed, skilled, and motivated adversary. They act macho when killing unarmed civilians. The solution therefore is to ignore the whining. Fortunately, the U.S. Armed Forces issue earplugs.
Some of these people are so detached from reality, they'd declare victory whilst standing alone on a pile of rubble.