Additionally, the initial civilian casualties on the Israeli side were also largely self-inflicted due to their indiscriminate use of force:

https://popularresistance.org/how-israeli-forces-trapped-and-killed-ravers-at-the-nova-festival/

A major reason Hamas launched the Al-Aqsa Flood operation was to take Israeli captives that could be exchanged for the thousands of Palestinians held captive in Israeli prisons. But Israeli forces were determined to prevent Hamas from taking captives back to Gaza, even if this meant killing the captured civilians.

An investigation of Israel’s long-controversial Hannibal Directive concludes that “from the point of view of the army, a dead soldier is better than a captive soldier who himself suffers and forces the state to release thousands of captives in order to obtain his release.”