For all Americans speaking in the media, the killing of Osama Bin Laden is self-evidently an act of justice. For a good many speakers heard in the British media this was more like vengeance.
The split seems to be between those who define justice in terms of law and due process, and those who see justice as an attempt to rebalance the moral universe — good actions cancelling bad.
The two principles are complementary in normal circumstances — but these circumstances are far from normal. Do we have the right to question the Americans' conviction that justice has been done?