You are correct, I did pay for that gunship with my tax dollars. I also paid for the training of those soldiers. Finally, the world opinion of America and Americans (including me) is affected by how we fight in Iraq.
So I feel I am justified in seeking an answer to this question:
What policy is in place that considers shooting an obvious makeshift ambulance a good idea?
Everything up to that point is a terrible misunderstanding. Having watched the video, if I were looking for AK47s and RPGs instead of cameras, I would have seen them. I'm not even going to second guess if the way to build a healthy Iraq is to destroy a group of people standing in a street with gunfire from a mile away, though I don't think that's the decision I would make.
But as for the van: everyone on the radio is clear that the van is picking up wounded. Very seriously wounded. Permission to fire was still asked for, and still given. Why? Even if everyone involved was 100% convinced those were bad guys, why? If this kind of conflict could be won purely by being the meanest guy on the block, Algeria would still be French.