I don't think that there are no idf who just love to kill Palestinians. And with the way better equipment it is sadly not easy for one soldier to murder many many civilians.
I really don't think the civilians have any chance if Israel escalates further.
Yeah. One 800$ hamas rockets costs Israel 80k$ for their iron dome equivalent. It is way costlier for them. However, unlike the comment I replied too, I don't think Israel will run out of people.
Maybe they will stop advancing once there are 'too many' casualties. But this will be way fewer than death people in Gaza.