It is your comments that are misleading.
https://www.govinfo.gov/content/pkg/PLAW-107publ206/html/PLA...
> SEC. 2015. <<NOTE: 22 USC 7433.>> ASSISTANCE TO INTERNATIONAL EFFORTS.
> Nothing in this title shall prohibit the United States from rendering assistance to international efforts to bring to justice Saddam Hussein, Slobodan Milosovic, Osama bin Laden, other members of Al Queda, leaders of Islamic Jihad, and other foreign nationals accused of genocide, war crimes or crimes against humanity.
From the ICC:
> Mr Vladimir Vladimirovich Putin, born on 7 October 1952, President of the Russian Federation, is allegedly responsible for the war crime of unlawful deportation of population (children) and that of unlawful transfer of population (children) from occupied areas of Ukraine to the Russian Federation (under articles 8(2)(a)(vii) and 8(2)(b)(viii) of the Rome Statute).