Getting the terminology right
Russia invades somewhere = illegal.
Israel bombs the shit out of hospitals, commits genocide, commits ethnic cleansing (for decades) = alleged.
The double standards are on show.
The International Criminal Court (ICC) says a "sophisticated" cyberattack targeted the institution, the second such incident in two years. It said the attack was detected and contained, and that mitigating steps are already being taken to manage its effects. The ICC did not detail what these "effects" were, nor did it …
Leave the "genocide" nonsense out. Israel's behaviour in Gaza is dreadful, but the total death toll there is two days' throughput at Belsen. If Israel really is trying to commit genocide they are remarkably bad at it. Meanwhile 150,000 have died in the Sudanese civil war and the same again in Yemen but nobody calls those genocides or marches in protest.
That is for the ICC to determine, not you or I. But the number of casualties is not the only factor in this determination. The systematic destruction of every single cultural, historical, educational site -- and the openly stated goal of making the land unlivable, certainly makes genocide plausible. Which is why the ICC took up South Africa's case, of course, and was further confirmed when after further investigations these arrest warrants were issued. US and Israel aren't signatories to the Rome Statute, but they are signatories the 1948 Genocide convention (although the US claimed some "immunity" nonsense).
You're absolutely right that the situations in Sudan, Yemen, and I could add several others, are also utterly horrible. The difference, I think, is that our governments (I'm dutch, most here are british and american) are not quite as complicit in those cases as they are in the Israeli crimes. We're giving them weapons and providing diplomatic cover. The UN has failed miserably, and our individual governments as well.