I mean, genocide is not a single event. Even a massacre is not necessarily genocide by itself. It's a systemic, large scale process. If we're going to the scale of genocide, it won't be about one or two events, but a multitude of events at which point it's getting hard to put the blame on a rogue person or on accidents.
That aside, it's of course something that the IDF went from "we are a modern, precise army, the best of the crop" to "no, we can't be at fault, we have no control over ourselves, everyone just does what they want".