Yeah, think about it some. It's unfortunate and sad that those two photographers were killed and the children were wounded. However, these soldiers are under constant stress. They're in a situation where they need to keep a keen eye all the time and think/act fast based on what they perceive happening. If they hesitate, there's an often good chance that they'll die. Through that gunner camera, they saw AK47s in the hands of some of those people, and two big, black blobs in the hands of two others that didn't look like cameras. So they asked for permission to engage. Based on what was seen there, they were given permission, as it looked like a group of armed individuals positioned to attack. A van appears unannounced and attempts to move what the soldiers thought were an enemy. The children weren't visible in the van, and I can bet that none of you could tell that there were even indistinguishable blobs, let alone indistinguishable blobs that were children, in that front window until it was pointed out towards the end of the video.
So the bottom line is, war is hell, and there will undoubtedly be collateral damage and loss of life in any engagement, despite what you see in video games and movies. All soldiers aren't informed of everything and who is or isn't an enemy isn't always clear. War journalism is a very risky business, and those journalists put their lives on the line daily to capture what's going on. Some are killed, some are captured, and some don't have anything bad happen to them.
I will admit, though, that the thing that isn't right at all is the gunner's commentary while this is all going down. It's understandable that he's antsy while waiting for permission to engage (remember, nobody knows that there are two journalists down there), as if it was an attack, they could have been shot down. However, his attitude while watching that man crawl around wasn't cool in the slightest. Keeping the crosshair on him wasn't bad in itself, but egging the guy on to grab a weapon just so he could open fire again was disgusting.
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