Both countries didn’t join the ICC. There are obvious reasons for that - They know about being guilty. Keep in mind that the US is going after Assange not because he published some arbitrary “secrets” - he published evidence of American war crimes that the US army wanted to hush up.
I think, arrest warrants for Netanyahu and quite a number of people in the IDF are simply appropriate. The ICC is no political cangaroo court, and it would not charge or convict someone without evidence. Especially not a prominent figure.