No stupid questions, but certainly stupid answers.

The USA is not a part of the international criminal court. So even if the ICC said the US committed war crimes, they have no way to enfore those laws in the USA.

ICC is for states that can’t prosecute within their country. USA can do that. So it goes like this:

ICC: Hey, USA, you committed war crimes USA: We dont recognize your court of law, and we did our own investigation where we found no wrongdoing. ICC: We disagree USA: Okay, that’s nice. We disagree with you.

Stalemate.