It's certainly not genocide, but If Israel ends up annexing Northern Gaza and doesn't allow the Palestinians to return to that land, then this will have been a textbook operation of ethnic cleansing. Genocide is only one method of ethnic cleansing.
Yeah I am pretty Israel/Bibi didn't think this all the way through. I doubt the internal politics would have allowed them to take a beat to strategize for long after Oct 7, but personally I would've waited to figure out a slower path. Might've ended up in the same place anyway but the Hamas playbook of hiding among civilians means they were always going to be in an impossible situation operating full-scale inside Gaza