Well, I would say as few as reasonably possible to eliminate Hamas.
If Israel was mass murdering people, this would be very, very different. We don’t know how many people have died, but we do know that Israel has been taking significant steps to avoid collateral damage, and we know that has been frustrated by war crimes perpetrated by Hamas (using ambulances as military transport, using hospitals as military bases, shooting civilians who try to leave the conflict zone) so I’m not sure what you want for me.
I want Israel to take reasonable actions to limit civilian casualties while they prosecute the war against Hamas which Hamas started and is continuing. I want that war to end immediately, but I recognize it can only reasonably end with either Hamas surrendering or Hamas being degraded past the point of it being a threat.