First of all, while the situation is tragic on both sides, such figures come from Hamas and are no doubt exaggerated. Early on they were showing photos of destruction which were actually from the Syrian civil war. Also, in an interview a Hamas spokesman denied that the Oct. 7 intruders attacked Israeli civilians. So any "information" from them is suspect.
Second, and I know I've asked this multiple times, what alternative path would Israel have when Hamas launches rockets from rooftops and alleyways in populated areas, when they vow to repeat the atrocities of Oct. 7 whenever possible and when they continue to hold hostages? Is Israel supposed to do nothing so as to avoid Palestinian civilian casualties while its enemy is trying to kill as many Israeli civilians as possible? Should Israel invite Hamas leaders over for tea and ask them nicely to stop attacking?
Hamas started this war. Hamas committed unspeakable atrocities and bragged about them on social media. Hamas continues to hold hostages and endanger its own civilians by hiding among them and using schools and hospitals as command centers and weapons depots. There were even reports that they forcibly prevented civilians from fleeing conflict areas to induce more of the kind of reaction you have. They could end this war any time by surrendering, disarming and releasing the hostages.