But that's what the court itself is for! You get plausibly charged with a crime, you go to court, and the case is determined one way or the other.

What happened in this case is that Israel beseeched its allies to lobby the court not to look into what was happening [0]. And the UK demanded hearings to impede the ICC warrants from being issued (purely politically, as this was done under Sunak and then Starmer/Lammy dropped the objection, but the delays were already underway).

[0]: https://www.axios.com/2021/02/07/israel-icc-political-pressu...