I mean there seems to be a massive issue with bombs being dropped and no combatants at all being killed in these bombings? Even if you believe Israels 'we've killed 22000 militants but have no idea who they are' story the number of 'targets' hit by bombs far exceeds the number of militants killed. So what are these 'targets' that are worth so many civillians lives, limbs, homes, businesses and infrastructure?
Attackers must take feasible steps to minimize civilian harm(choosing precise weapons, timing attacks when civilians are not present), that is international law, if there are no militants there is the only way to destroy these 'targets' to drop massive bombs and take out, sometimes, whole families with them? Even if a target is military, an attack is unlawful if the expected civilian harm would be excessive compared to the anticipated military advantage.
There have been 1000s and 1000s of bombs dropped that haven't killed any militants at all, they've killed almost as many children as the number of militants they claim to have killed. To say we are continually told that Hamas are using civillians as 'human shields' they seem to be emerging completely unscathed from a lot of these bombings by Israels own admission.