Mark Bowden pointed out in his book `Blackhawk Down', and shown in the movie as well, that the Mogadishu civilian moos (non-militia) rushed to firefights, when one would think they'd seek the safety of their homes. Some picked up guns or shielded gunmen, so the Rangers shot them.
Same thing here. The real tragedy was that a Marine died from a IED, but you don't see much mention of that unless it's the MSM trying to use it for propaganda purposes.
What does "chalk 4" mean?