This sort of formulaic finger pointing is the product of a form of cultural self-loathing as people are so paralyzed by the fear they will be considered racist if they reject the barbarity of any people not their own that they are only capable of attacking western people, western ideas and western groups.
"you're better off on Stormfront discussing how evil brown men are taking innocent white flowers." Infinite Chaos
Only when the United States itself is perfect (and of course it never will be in the eyes of the Leftwingers) can the American people ever complain about atrocities committed elsewhere. And of course it remains "arrogant" for the American people to defend themselves.