When the Israelis impose a system of racial domination on Palestinians that is objectively worse than Apartheid, I’d say you needn’t bother handwringing about Israelis getting their feelings hurt. Fascists is always an alternative though - they’re politicians have used it themselves.

Netanyahu himself has made racist jokes favouring white Jews over the north african immigrants, so while ‘white supremacist’ also works at that point, you’re back to just saying ‘Nazi’.