That's what they said, I am pretty sure Israeli goal is not eliminate Hamas.
Because you can't just eliminate Hamas by going in and taking them out, you will need to occupy Gaza and form a group of government to hold power there and once it's strong enough then you leave. That mean temporary occupation. And they are not doing that, and most Israeli don't really care about that either. Which mean if they say they are doing this to oust Hamas, then either they have the stupidest plan of all or they are just saying that but doing some other thing.
Unless they are really trying to reoccupy Gaza, this is probably just going to be an "Operation Body Count" It's smell like it, it sound like it, they know it's impossible to evacuate that many people with one closed border, even if Egypt do open that border, that's not going to work and Egypt would most likely won't. Which means that's the same old trick "I have warn you already and you didn't leave so don't blame us" kind of message
Another thing is, if they are serious about going into Gaza, they are overdoing the bombing now, you want them to fight you in those houses so when you bomb them, you know your enemy is going to be bury under it when you bring the building down. You bomb them when you had already went in, not when all your troop is still at border, you can still bomb strategic target like comms center, staging area, ammo depot and stuff like that, but it wouldn't need 6000 sorties with ten of thousand targets, you don't have that many strategic target in Gaza.......