As horrible as the Israeli mindset is, their subjective viewpoint is at least somewhat relatable: An ordinary Israeli citizen is born in that land, knows nothing else, just learns that the entirety of the surrounding populations want them dead - and will with very high likelihood experience terror attacks themselves. That this upbringing doesn't exactly make you want to engage with the other side is psychologically understandable.
(I'm imaging this as the universal experience of all Jewish Israelis, religious or secular, left or right. I'm excluding the religious and Zionist-ideological angles here, because those are a whole different matter once again)
What I absolutely cannot understand is the behavior of our states. We're pretending to be neutral mediators who want nothing more than to end the conflict, yet in reality, we're doing everything to keep the conflict going. We're fully subscribed to Zionist narrative of an exclusive Israeli right to the land (the justifications ranging from ostensibly antifascist to openly religious) and we're even throwing our own values about universal human rights and national sovereignty under the bus to follow the narrative.
If the messianic and dehumanizing tendencies of Israelis are answered by nothing else than full support and encouragement of their allies, I don't find it exactly surprising that they will grow.