But it's not all zionists committing war crimes in Gaza, it's the IDF. And it's not all IDF members, only some individuals. And its not all of those some individuals, only some of their brain and trigger finger. And it's not all the time, only some of the time.
We mustn't generalize.
You are surprisingly right. I know people who served in IDF and would prefer to have nothing in common with those criminals. Generalizing to them would be wrong. It is not voluntary service, different people are required to serve. But people aside, is IDF as institution rotten? It is not generalization to say „yes“, when such things happen. An institution is an entity with the agency to prevent such things and not only did it fail, it covered up. Is Israeli government complicit? Hell, yes, same reason.
There were people in the German army (Wehrmacht) who wanted to have nothing in common with those criminals. Some even tried to kill Hitler and get rid of the regime.
Not the majority though, else the wehrmacht would have done less war crimes.
I think this depends on whether you draw the boundary at "refuses to do X even when killed for it" or "wouldn't have done X on their own".
IDF is an army of Israel, not some unknown militant group.
Israel is a state, as they call "democratic", which elected officials who have control to stop these crimes, but not stopping deliberately.