You’re using an argument for the exceptions as the rule. It’s wildly sensationalist.
Out of 4,100 National Guard members and 700 Marines dispatched to LA, there has been one detainment of a US citizen, and no arrests. Detainment is currently being debated as a possible violation of the Posse Comitatus Act. https://www.reuters.com/world/us/us-marines-carry-out-first-known-detention-civilian-los-angeles-video-shows-2025-06-13/
There are also many instances of the National Guard laying down their riot shields, and even taking a knee to support citizens in peaceful protest. https://www.militarytimes.com/news/your-military/2020/06/02/tennessee-national-guard-troops-lay-down-riot-shields-at-protesters-request/
The US has not signed the Rome Statute, and is therefore not beholden to the laws of the ICC unless in a nation that has signed said agreement.