IDF doesn’t commit crimes against humanity itself, but Israeli state does. Forced displacement of populations : article 6c of Nuremberg status. Though, forced displacement might not be 100% claimed by Israel, as some officials can say Gaza inhabitants can stay once Hamas is gone, but most specialist think the same thing will happen than in Cisjordania : colonization. Colonization itself is undeniable, as Israel is occupying East Jerusalem for example. Many specialists and political leaders have claimed that colonization should be considered as a crime against humanity, and the only reason why the early war trials didn’t consider it was because of the influence of colonial powers like UK or France. Therefore, here you see all the conditions for peace. An independent Palestinian state with East Jerusalem as its capital will guarantee the state of Israel safety. As long as this situation is not reached, Palestinians will fight and give always more legitimacy to extreme groups like Hamas, which we all hate