As for the rest, you’re conflating two very different things. War and Ethnic cleansing.
If you raze an enemy city to the ground, even if that city is full of a certain people, thats just a reality of war. One of the brutal and barbaric realities of war but still war and its been the same since razing a city became possible in war but its not genocide.
Obliterating an enemy village is the same but smaller scale and in the context of Huwwara specifically it was a vengeful statement in response to the murder of two Jewish brothers. Right, no probably not, but neither is it genocidal.
Ironically, Hamas are the ones attempting to commit genocide. The Hamas charter is pretty explicit in this. Israel aren’t, they are just in a war, a war in which they have the means to flatten every single place where the enemy could hide, and are vengeful enough to wage war in that way because of what was done to them.