Revise History Much?
War is an ugly thing, and no amount of outrage of casualties on either side, or of innocents, will ever cause it to change. Instances of friendly fire have been reduced considerably since WWII, VietNam, Desert Storm, etc. But, they will never go to zero. Characterizing friendfly fire as murder is an injustice to the men and women who are in harm's way, who sometimes have a split second to make decisions, and who sometimes err and unintended casualties ensue. It is regrettable, but it is a part of war. Americans too, have been hit by friendly fire from allies and their own troops. We try to figure out how to prevent mishaps like that, put ROE in place, use better communications and planning, but it still happens.
In this particular case, that area of Baghdad had earlier seen a series of firefights and RPG fire. Now come along several men with "something" on their shoulders. From the video it is not possible to tell what the objects were. The crews asked for clearance and received it, because the reporters were acting independently in a war zone and no U.S. or Iraqi military had any knowledge of their presence. The van that was subsequently targeted could just as easily been a support truck for the hostiles. This is what happens when your enemy refuses to abide by the Geneva Convention, and when reporters take it upon themselves to wander around unescorted in a war zone. Everyone, besides your own troops, looks like a bad guy. Yet we ask young men and women who are putting their lives at risk to somehow discriminate correctly every time. It will never happen.
As for friendly fire incidents involving both Canadian and U.K. troops, each has received and given of their own, sometimes shooting up U.S. personnel as well as Afghan units. It's not pretty, it will never be "precise" (I hate that term, along with "collateral damage") because everyone assumes there is some kind of "fix" that will enable allied forces to only hit bad guys, with no innocents being killed. Welcome to war, it is an ugly, horrid proposition.
If you don't want your country's troops engaging in war, fine, notify your representative in your government that you oppose such things. Vote for the party that opposes war, speak out against war on streetcorners (if such an action is legal where you live). But do not, EVER, accuse the young men and women who are out there trying their best to kill the enemy before they get killed, of murder in the course of their legal actions. If you can find another My Lai Massacre, go for it, but so far the leaked emails don't show any such thing. Just ordinary people trying their best to get the job done and come home to their families.