The man who would replace Netanyahu, Benny Gantz, considered to be a left-wing Israeli politician, will do the same things that Bibi has been doing... ya know, considering it is a unity government and all. The leftists who think they'll get their way in allowing Hamas to survive by getting rid of Netanyahu really are ignorant.
Those aren't leftists. It's mostly liberals who tell themselves that israel as a ethno nationalist state is perfectly fine but that a prime Minister boastfully taking Israel to it's natural conclusion of ethnic cleansing and genocide is too much. They want it to be done more quietly.
Any sources to back up your claims? 20% of Israel's citizenry are ethnic Arabs and practicing Muslims. Israel has 100% air superiority over Gaza, if they wanted to ethnically cleanse Gaza or the West Bank, they certainly have the ability to do so. But there is no evidence that they want this. None that I've seen at least.
You know who does want to ethnically cleanse another culture/religion from the world? Hamas. Iran, Hezbollah. The Houthis. ISIS. The Taliban. What do all of these groups have in common, hm? Israel is surrounded by militants who have sworn to eradicate all Jews from the planet. In light of that, I think Israel is showing incredible restraint.
Leftists (in the US, the far-left equivalent of the "alt-right") are the ones currently rioting and protesting across major cities and college campuses across the West. Liberals are overwhelming supportive of Israel. Conservatives are overwhelmingly supportive of Israel. It's the radical extremists who want Israel destroyed.
Wait why should Hamas be allowed to survive? They are not the good guys, they are not Palestine, they are wealthy men living abroad. I was hoping this would be a great chance to end both leaderships, not pretend like Hamas are victims