The more vulgar apologists for US and Israeli crimes solemnly explain that, while Arabs purposely kill people, the US and Israel, being democratic societies, do not intend to do so. Their killings are just accidental ones, hence not at the level of moral depravity of their adversaries. That was, for example, the stand of Israel's High Court when it recently authorized severe collective punishment of the people of Gaza by depriving them of electricity (hence water, sewage disposal and other such basics of civilized life).
The same line of defense is common with regard to some of Washington's past peccadilloes, like the destruction in 1998 of the al-Shifa pharmaceutical plant in Sudan. The attack apparently led to the deaths of tens of thousands of people, but without intent to kill them, hence not a crime on the order of intentional killing - so we are instructed by moralists who consistently suppress the response that had already been given to these vulgar efforts at self-justification.
To repeat once again, we can distinguish three categories of crimes: murder with intent, accidental killing, and murder with foreknowledge but without specific intent. Israeli and U.S. atrocities typically fall into the third category.