I never said that resisting occupation is illegal. But we are talking about Hamas and sector Gaza here. There was no occupation of sector Gaza from 2005-ish.
You are saying that there is ethnic cleansing that happen in sector Gaza for years. Did you check the population of sector Gaza? The only ethnic cleansing that happened there was when Israel removed Jewish settlements. So let’s not through big scary words like “ethnic cleansing” when simple check of reality on the ground is totally against the meaning of the word. That includes today’s war where IDF goal is removing Hamas. Yes, there are civilian casualties - it happens in a war especially when Hamas uses civilian shield.
Now, with respect of Israel engaging “terrorism”, aren’t you confusing things? Was it, again, Hamas that was promised to destroy Israel and was shooting rockets into Israel and doing other terrorist acts? What Israel could possibly do when your neighbor shoots rockets at you with promise to destroy you? What? Again, Gaza Strip was NOT occupied. West Bank was, but would you de-occupy the West Bank when it might go the way Gaza Strip went with Hamas coming to power and following terrorist attacks for years?
Also, if it was Israel goal to do ethnic cleansing of sector Gaza at any point, than it would have done it - no Hamas resistance would be enough.
But let me put forward a simple truth, which you seem to ignore - there is no path to peace with Hamas in power. None. For the sake of Palestinians and everyone in the region, it must be removed. If you do not want the repeat of the same situation for both Israelites and Palestinian people with casualties in civilian population on both sides, Hamas has to go. There is just no alternative. No matter what crimes who did in the past - the path to the peace does not include Hamas staying in power.