The United States does not police the world. We invade it.

"The ICC is the permanent international court in The Hague with a mandate to try those responsible for genocide, war crimes, crimes against humanity, and the crime of aggression," which is why the US is a rogue superpower by virtue of not ratifying into law our signature of the Rome Statute.

Our political and military officials would be subjected to imprisonment and we'd never get away with our regime change military invasions and proxy wars. We'd never get away with maintaining 800 international military bases.

And US Secretary of State Michael Pompeo couldn't impose Visa bans, March 15, 2019, on the International Criminal Court staff who are attempting to investigate US personnel. If we weren't guilty there would be no visa bans.

The ultimate objective of the ICC is to make war illegal and who doesn't want that?

[hrw.org]