Without name calling which is not productive here are my thoughts for what they are worth.

1) Any reporter working in a war zone is required to inform the military units they are assigned to as to where they will be ... clearly this was not done or if it was done, a major screw up occurred.   Failure to do so will get them sent home by the military. In this case it cost them their lives

2) In urban warfare every soldier, pilot or any member of the military is taught that at any moment in time there will be on the ground, bad guys, CIA agents, civilians, and civilian medical personnel religious groups and the list goes on. That is why a confirmation of an order to engage is necessary.

3) The pilot believed there was a threat, however reviewing the film I cannot see weapons after reviewing several times. Was the pilot justified, yes he was given the order to engage. Was the engagement necessary ... No not from what I seen. They were too quick to pull the trigger since they were not under fire at the time and the situation was being monitored.

War is a terrible thing and mistakes happen, but this mistake should not have happened in my opinion. And I do know a thing or two about urban warfare and counter terrorism.