What am I missing, am I just really stupid? Is it not only countries that have signed the Rome statute that are part of the ICC? Neither Israel or Hamas are signatories, why would they be subject to arrest?
Here's what the prosecutor has to say about that:
On 5 February 2021, Pre-Trial Chamber I decided that the Court can exercise its criminal jurisdiction in the Situation in the State of Palestine and that the territorial scope of this jurisdiction extends to Gaza and the West Bank, including East Jerusalem. This mandate is ongoing and includes the escalation of hostilities and violence since 7 October 2023. My Office also has jurisdiction over crimes committed by nationals of States Parties and by the nationals of non-States Parties on the territory of a State Party.
In other words, he's making it up.