Why our gov't bans YouTube & sites like it from soldiers

Sorry I'm not jumping up and down and waving the American flag when I see footage like this. When I first saw this, I had two thoughts:

1. I wonder how many people died?

2. I've never been a soldier, and I'd like to believe (and I sure hope) there was a very real reason for our soldiers doing what they did. I'm sure there probably was, and who knows? Maybe a few Americans were killed by people suspected of being in the mosque. I've never been a soldier and I don't pretend to know all of the dynamics of what goes on in war, but I do know this -- nothing brings out the worst in humanity like war. History has proven it time and time again. In fact, we've seen several high-profile cases of that phenomenon in this war.