As I hope you're aware:

https://en.wikipedia.org/wiki/American_Service-Members'_Prot...

The USA isn't a party to the Rome Statute, and above and beyond that, reactively passed domestic legislation to thwart any attempt to prosecute crimes committed by its military, including in countries that are party to the Rome Statute -- more than 20 years ago. This is not a recent phenomenon.

You know what else is more than 20 years ago? Americans committing war crimes in other countries:

https://en.wikipedia.org/wiki/Abu_Ghraib_torture_and_prisone...

Remember?

The USA, as a country, doesn't want to be held to account by other countries. As it outspends all the other militaries on the planet, it continues to get away with its crimes.