Probably futile counterattack

Groups that support Iran attacked US troops in Iraq. The US counterattacked, but that was probably futile.

I would expect that the attackers are religious fanatics and would be thrilled to be martyrs, so fighting them will tend to be ineffective unless the US army can destroy them. That would be quite difficult.

The US must refuse to be intimidated by them. If the US were to drop its support for Israel's fighting in Gaza to appears fanatics, that would only make the US seem weak.

However, for the US to insist on supporting Israel's fighting in Gaza in order to spite hostile fanatics would be childish.

The US should do the right thing in Gaza, and the right thing is to make Israel stop its war crimes.