And it's worth bearing in mind too that remember Palestine is a party to the international criminal court, and the court has jurisdiction over anything that occurs on Palestinian territory, so that the actions which take place in Gaza itself, even though Israel is not a party to the international criminal court, nevertheless in its operations on Palestinian territory the court would have jurisdiction over those.
--- Stephen Neff, https://youtu.be/OfbRifEzDxI?si=Ac5vPj1PMgCVZoh0&t=1335
The Geneva conventions set out a series of what are called grave breaches of the conventions. And every country that's party to them - which is every country in the world virtually - is obligated to take steps against persons when they are in the territory. So I think if a neutral state finds somebody who's been involved and or suspected of being involved in international crimes, that they are perfectly entitled and indeed under the Geneva conventions actually obligated, to take legal action against them. Because these are legal actions against individuals in their own right and not against states as such.
--- Stephen Neff, https://youtu.be/OfbRifEzDxI?si=9t7Q65buPN19RJfs&t=1032