I wouldn't say they're not under the empire's heel. It's just some tools need to maintain better credibility than others. If a supposed human rights org were to lay down on this, they'd have zero credibility or use as a tool in future to make up a genocide in China or other bad country because people would rightly notice the problem. Anti-zionism has been growing even in liberal human rights circles for decades because it's just so obvious even the propagandized idealists can't quite ignore it and frankly it existing on some level is even useful to the zionists who desire above all else to drive all Jews to them.

There's no real impact here, they have no power to actually enforce this or use it to coerce the zionist entity to stop doing genocide while the US is shielding them. But doing it lends legitimacy to their charges against Putin and Russia and potentially other future enemies of the US/NATO which liberals will point to and say they're in fact prosecuting US friends and therefore MUST be impartial and you should trust they have no agenda but justice.

Compare to even people in the US government who have quit over saying that the zionist entity is doing human rights violations because the secretary of state quashed their findings to allow funding to continue. So these kinds of findings don't change things.

And you'll notice they equivocate by equating what Hamas does to what the zionist entity does, by issuing warrants for both in a wishy-washy, liberal "both sides bad, conflict is complicated history, blah, blah, bad actors both sides" thing that allows the larger colonial project of "isreal" to escape scrutiny or for people to reckon with the fact Hamas has a legal right to resist using violence by painting them with false atrocity propaganda thus leaving the whole thing "complicated" in the minds of many liberals and easily pawned off on one bad man theory for why the zionists are doing genocide which paints the path towards their redemption once he's out of power.