Palestine is a member of the ICC (2015) and as a result the ICC has jurisdiction over war crimes committed in its territories! Gaza is Palestinian territory! As a consequence, ICC has jurisdiction to investigate and prosecute war crimes committed in Gaza.
The US govt’s HYSTERIA at the Israeli arrest warrants stem from their participation in the war crimes and the inevitable public airing of the degree to which they facilitated the war crimes. Also their bosses in Israel told them to carp.