I have not problem with the soldier's actions. As I previously mentioned, combat zone = killing. There is no time for asking questions.
But, the press should be reporting the killing in whatever its manifestations. One of my big problems with the US is we think war can be sanitary. It can't be. That does not mean we should shy away from it. But we should know the exact nature of what we are getting into so we can decide what actions are available.
Sites knew exactly what the effect of his little video would be. Sites and his handlers were slavering over this and now they have their pound of flesh. At the very least he should be stripped of his passport and sent home.