Your worldview is built on top of the assumptions of liberalism: international law, sovereignty determined by institutions like the UN, etc.
The people who support this are not liberals when it comes to international affairs, even if they might be (but often are not) liberals at home. They know that they're violating international law. But they don't care because they do not value international law as it is currently constructed. They see it as an unjust imposition, made up by a bunch of lawyers and diplomats, that prevents them from securing their own interests.
The trouble for these people is that politics has not been openly this way since the cold war because the position is untenable. A group that gets its power by pushing the doomsday clock is ultimately dependent on some counter force putting seconds back.
I understand what you're saying. But, I don't have any "liberal assumptions". The Gaza Holocaust has demonstrated that there really is no such thing as international law, because there's no enforcement against certain parties, because they are deemed too powerful to touch (US empire, essentially).
Note, that's not the world I like to see. It's just the world we have.
But pointing out the outright hypocrisy of certain parties actions, vis a vis international law, natural law, or even "what if we flipped the tables?", is always worthwhile (I hope). Even if it's just shouting into the wind
There was only one Holocaust, the Shoah. Even if the Gaza events qualified as a genocide, a label that can be applied to many such events throughout time and place, that is still not a Holocaust.
I mean it's not nearly comparable to the Holocaust either in means or scale or intent or cause or any other dimension, and I reject these rhetorical games that try to get something labelled a certain way to achieve a persuasion outcome.
The people who support this are not liberals when it comes to international affairs, even if they might be (but often are not) liberals at home. They know that they're violating international law. But they don't care because they do not value international law as it is currently constructed. They see it as an unjust imposition, made up by a bunch of lawyers and diplomats, that prevents them from securing their own interests.