Not intercepting the PMs plane and arresting him for the ICC warrant is also illegal under international law. Israel can’t legally occupy the settlements that they do, that’s a violation of international law. They can’t bomb refugee camps, that’s a violation of international law. They can’t starve Palestinians intentionally, that’s against international law. They can’t refuse medical help to injured civilians or Hamas fighters who cannot fight anymore, that’s against international law.

I’m assuming, as somebody quoting some random treaty to me, that you’re a liberal who views laws and legality as the order that holds our world together. It must come as a real shock to you that no state actually gives a shit about what’s legal, they only care about what they can get away with. Unless you can force your government to abide by a law, they can do whatever the fuck they want. That’s the neat thing about laws, they don’t mean shit unless the government in question decides to abide by them.