There is no state organised war crimes going on, just normal war. If you can't understand the distinction that's your problem not mine. In my opinion Israels actions in Gaza fall well within the actions of a legitimate war, to the extent warfare can be legitimised. I'm not commenting on individual cases, and anyway those are not relevant to my argument.
The point of the ICC is to resolve this sort of question via a thorough legal process, just like we have in so many democracies around the world. Israel wouldn't be on trial, Netanyahu would. I presume you are talking about him at least. And if he is innocent then he should have his day in court.
And yes, fully embracing the ICC would be a radical shift for the entire world. We would be bringing in a lot of people other than just Netanyahu. The idea is that no one is above the law, no matter how important they may be.