Its very easy for a bunch of panzies sitting in comfy chairs in nice air conditioned offices to say "Oo look they are simply firing at random." Those pilots are in a combat environment, it's killed or be killed. If you suspect your being fired upon then you engage. That guy leaning out from behind the building had a RPG and I definitely spotted at least 1 AK-47. Yes its sad about the two journalists, but it's just one of those things. This video does not reveal all the facts though, since the mice only records when they speak we have no idea if they where under fire or not, for that we have to take the worlds of the pilots and the military investigation.
While many of us may find it easy to simply condemn these actions as brash or unprovoked, until we've been in a similar situation we never know how we would react.
There in lies my main problem with Wikileaks, the stuff they release helps no-one, its spreads animosity towards the military and in some cases indirectly cause deaths. There are somethings that are secret for a reason.