General Discussion

If it is to "eliminate" Hamas that is unlikely and you can't really defeat an ideology but the vast majority of targets are aimed at civilian targets with no real military objective like you would see in wars fought back when most countries respected international & humanitarian law. During the most recent ceasefire you saw Hamas on the streets with plenty of members still left so Israel did a lot of killing but didn't actually get much of Hamas.

If they are trying to ethnically cleanse as much of the Gaza population it will take a long time depending on how long Israel's allies allow it to continue.