I’m also thinking about the massacres during the great march of return[2], where Israeli soldiers fired indiscriminately at unarmed protestors. In the protests, and the ensuing conflict, Israel killed 223 people, by far majority of whom were unarmed civilians. You can argue that mass demonstration is provocative, but the response of indiscriminately killing unarmed protestors is not a proportionate response.
And finally, I’m also thinking about the flour massacre[3], where the Israeli army purposefully went, unprovoked, into a civilian area and started to shoot everyone. At least 118 civilians were killed and 760 were wounded when the Israeli army shot at people trying to gather food after having been deliberately starved by Israel the months before.
The parent (who I’m trying not to engage with) is also just wrong when they claim no international law is broken by Israel. They currently have one ICJ case ruled against them, that of the illegal border (or apartheid) wall in the west bank, which the ICJ ruled illegal in 2004[4] and demanded they take down (which Israel hasn’t). The have several condemnations by a pletora of international humanitarian organizations. There are two ongoing ICJ cases against them, one for genocide, and their leaders stand recommended for indictments at the ICC.
There are many more examples than the three above of Israel blatantly violating international humanitarian law. Which is why the UN general assembly overwhelmingly voted to press charges at the ICJ to find out what the consequences of these gross violations should be[5].
1: https://www.cnn.com/2024/01/30/middleeast/israel-undercover-...
2: https://en.wikipedia.org/wiki/2018%E2%80%932019_Gaza_border_...
3: https://en.wikipedia.org/wiki/Flour_massacre