I don't know firsthand, but I can imagine that the gunner seat in a chopper like this is pretty high anxiety. Your life could depend on shooting the right people at the right time. Not only your life, but the lives of all your buddies flying with you, not to mention the fact that you're protecting a piece of machinery that cost your country millions.

All I was saying before was that gunners like this are used to facing insurgent tactics. When they see vans like this, they aren't looking to give them the benefit of the doubt. They have been trained that, if they do, they may be putting their lives and the mission at risk. This guy is probably scared out of his mind. He has a huge responsibility, and screwing up - as we've seen today - has enormous consequences.

To me, the laughing and joking isn't making light of slaughtering the enemy, it's nervous laughs and desperate attempts to bring everyone out of it. We're human, we don't deal with this shit well. The comments here are good proof of that.

None of this excuses slaughtering innocent unarmed civilians, it's just my attempt at bringing some perspective.