It's hard to speculate on the circumstances of their deaths given there is no reliable independent reporting on it, but I'll give it a go as you asked.

Certainly starving civilians are being killed by the IDF. I'd be shocked if some of the deaths aren't related to self-defence. Given there look to be credible reports of the IDF operating kill zones, and allowing on the ground soldiers to set their own rules of engagement, as well as making it generally clear it's little issue in collateral deaths it's difficult to have much empathy with those numbers.

A number will be attributable to friendly fire and accident too. It wouldn't surprise me if that's a significant proportion, potentially the majority given the level of sniping, significant munitions and general anarchy.

Finally, I'm sure some are as a direct result of actual engagement with Hamas.

Any reporting by the IDF is obviously security checked propoganda, filtered through multiple levels of approvals and inspection.