Thank you for actually addressing the philosophical elephant in the room. There's way too much vitriol substituting rational thought when it comes to courts in general, doubly so for international courts. They are compacts and agreements, no matter what scale you're looking at, and there's a reason depictions of "Justice" as a lady hold scales and a sword. Neither one works without the other. The term "outlaw" used to mean outside the protection of the law, in both directions. What do these courts protect America from?
That being said, sanctioning them feels a bit odd. Might be some latent jingoism but I don't see a threat from the ICC being substantial to US citizens.
No, since we're adults, aware of these nuances, it's not the elephant in the room.
The Elephant in The Room is that this is announced at the Nobel Peace Prize Winner with a relationship with the ICC studied the horrific conditions in Gaza.
That is what is happening here.
This is not a subtle ideological argument about 'international law'.