While the president has stood strongly behind Israel since Hamas attacked, he said on “60 Minutes” that a new occupation of Gaza would “be a big mistake.”
The last thing the US wants to bring up in discussion is the killing of civilians, I imagine. We killed hundreds of thousands just in Iraq. (And that's not counting the embargo we had against Saddam that starved a million people and gave rise to Al Qaeda either.)
I think that is exactly what we want to bring up from the US. We fucked up our response to 9/11. We have some perspective on pushing for restraint for Israel reacting to their 9/11. Even if we avoid moralizing on civilian life, we are least can talk about the cost of perpetual war and occupation.