This is your error. States and peoples are not unitary entities with a single coherent outlook and will. The vast majority of the Israeli population is far too young to have directly experienced the Holocaust, which ended 80 years ago. There are plenty of people in Israel who do not want to commit atrocities against Palestinians. There are also people who feel that they have a (literally) god-given right to occupy the territories where Palestinians currently live. If you think of Benjamin Netanyahu's cabinet as being basically the same people who survived Nazi concentration camps in World War 2, then nothing Israel is doing in 2024 will make much sense.
To my mind, Israel's actions toward Palestinians (both in Gaza and the West Bank) are powerful evidence that nationalism inherently leads to atrocity no matter who's involved. If the cultural memory of being targeted by the Holocaust won't stop an ethno-state from setting up an apartheid regime, what will?