They are clearly laid out in International Laws:
The laws of war in a nutshell | International Committee of the Red Cross
The laws were created for humanitarian reasons. To break the law is a war crime. To
You do not target or deliberately bomb civilians. (Putin and Netanyahu – guilty)
You do not use water or food or medical aid as weapons (Netanyahu guilty)
You do not use torture (Netanyahu and Putin – guilty)
You do not use rape (Netanyahu and Putin – guilty)
You do not target schools, hospitals and community centres (Netanyahu and Putin – guilty)
Putin’s invasion of Ukraine was an act of aggression that broke international law. The subsequent pounding of civilians areas, targeting of schools, hospitals, power stations and civilians were war crimes. The systematic torture, rape and executions were war crimes. The abduction of children is a war crime.
Even if Israel’s invasion of Gaza can be considered a war the way it has been conducted has all the hallmarks of a massive war crime. Netanyahu has pounded Gaza into rubble, targeted hospitals and schools, starved and harassed the entire population, used water and medical aid as weapons, and indiscriminately shot and bombed civilians in what amounts to genocide.
Put and Netanyahu, along with all the politicians and generals involved in planning and carrying out these war crimes should be dragged off to Nuremberg and put on trial!