You need to show that the intent of Israel is to destroy the Palestinian people in Gaza, even partially. What I see is the attempt of Israel to prevent more October 7 attacks, which Hamas declared it is going to repeat. The actual goal here is to protect Israel's own citizens from genocide, which Hamas has shown willingness to commit and ability (albeit in a smaller scale currently).
I think it is perfectly valid for a country to protect its own citizen from being burned alive among many other atrocities that were committed, which is also one of the reasons the genocide convention was created in the first place.
As this is war, it's also causing immense suffering in the Palestinian side. Which is why a war to remove Hamas from power was constantly deferred in the past, knowing they are highly entrenched in the civilian population. However, I don't think they left Israel any other way this time.