no, it doesn’t go out the window.
I don’t know who you might mean by “us” but war crimes is something that is known and definable and quantifiable
Maybe it’s because I’ve been following human rights issues my whole adult life that I notice these things.
People do and have served time for war crimes in various ways or been sanctioned or whose actions had consequences in future treaties and business negotiations between Nations or corporations or individuals.
This stuff often doesn’t make the major news or even the minor news yet this work is ongoing and documented
“GENEVA (22 June 2015): The United Nations Independent Commission of Inquiry on the 2014 Gaza conflict has gathered substantial information pointing to the possible commission of war crimes by both Israel and Palestinian armed groups.”
https://www.ohchr.org/en/press-releases/2015/06/un-gaza-inquiry-finds-credible-allegations-war-crimes-committed-2014-both
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