You are misstating what the ICJ decision said.
More importantly, read the words of the dissenting judge Julia Sebutinde, a distinguished British trained, Ugandan jurist. HER position is based on International Law and the rules of evidence, not on political opinions and sympathies.:
“South Africa has not demonstrated, even on a prima facie basis, that the acts allegedly committed by Israel and of which the Applicant complains, were committed with the necessary genocidal intent, and that as a result, they are capable of falling within the scope of the Genocide Convention,” she added.
Prima facie is Latin for “at first view” to denote an initial examination.
“Similarly, since the acts allegedly committed by Israel were not accompanied by a genocidal intent, the Applicant has not demonstrated that the rights it asserts and for which it seeks protection through the indication of provisional measures are plausible under the Genocide Convention,” Sebutinde continued.
“The provisional measures indicated by the Court in this Order are not warranted,” she conclude