From a moral perspective, it seems like you're saying the ICJ would be a better arbiter of morality than Israel, but my point didn't involve an appeal to any authority; that just doesn't seem necessary when discussing morality.
> [consensus] just doesn't seem necessary when discussing morality.
That would not be an entirely unexpected claim from any given person who doesn't like the humanitarian consensus, Just like it was not entirely unexpected to see Israel claim that international laws don't seem necessary when violating international laws they don't like.
I think we're both smart enough to realize what would happen if each person on earth decided that they were the true arbiter of law and morality, and had the right to do whatever they wanted, regardless of the law or what anybody or almost everybody else thought. So it is good that the consensus is that consensus is indeed necessary when writing and enforcing and judging the laws we wrote, around such moral standards as "don't genocide people".
By rejecting the concept of this consensus, which you call an "appeal to authority", it seems this topic is indeed being reduced to whether Bibi will say "whatever, I do what I want" like Putin or Cartman or Kony or Sinwar, while his country continues to spiral into international pariah status. So, I will submit a bet that he will, and leave it at that.
For example, parts of international law come from UN security council resolutions, which are passed based on 9/15 security council votes, and no vetos from the 5 permanent members. The permanent members include Russia and China, and non-permanent members often include other authoritarian states, like UAE until recently. Trump may soon have authority over US votes. Do you trust these political entities as bastions of morality?
I understand Israel disagrees with this consensus. I understand you may disagree with this consensus. I accept that if global consensus hasn't already changed your minds, I might not, either. That is okay. Consensus doesn't require buy-in from any single particular person or country. But as a general rule of thumb, if a great majority say you're in the wrong, and you say they're all in the wrong for saying you're in the wrong, that means you're probably in the wrong, so it's worth seriously considering the possibility.
Your latter observation doesn't seem to apply here, as it seems the ICC and ICJ based their findings and rulings on laws and ethics, not politics or bias, and it doesn't seem like the laws themselves are biased against Israel in particular, either.
There's no evidence the opposition is driven by antisemitism. The large amount of jewish people who oppose the Israeli genocide of Palestinians should give a clue that judaism isn't the issue here. Russia is trying to do the same thing to Ukraine as Israel is trying to do with Palestine, and receiving equal condemnation worldwide. Only they exclaim "russophobia!" when criticized, rather than "antisemitism!"
Not Gaza, Palestine. That includes Gaza and the West Bank, which has been under Israeli apartheid for a long time. There is rarely an unrestrained right to self-defense of a country engaging in apartheid and genocide, against those upon whom they are perpetrating it. Does Israel grant Palestinian-born subjects in the West Bank (a territory Israel dominates) freedom, self-determination, safety? Does it treat them equally to Israeli-born subjects? No, and that's illegal (and apartheid).
The "self defense exception" was cited by Israel, and the court judged that their illegal actions go beyond legal self defense. If we take a moral perspective rather than a legal one, it would be immoral to substitute Israel's judgement for that of the ICJ, a less biased and more informed body. From a utilitarian objective standpoint, we arrive at the same conclusion: It's unlikely Israel has some magical higher understanding that all other countries lack. Plus, legitimizing claims by defendants like Putin, Bibi, Sinwar, Kony, Gallant, or Haniyeh et. al, that they somehow know better than the court, would kinda defeat the purpose of the court.