And that isn't the case in the original quote. The US isn't listed as specifically bad, it is included as a member of a list where the author contends mistreatment of some groups is common:
"In societies including the US where violence.."
Nothing special or notably different there. Additionally, usually the kind of articles you are alluding to are addressing a US, or at the very least a Western/Anglophone audience, so if the US or UK are pointedly included, the intent may be read as "'we' are not any better at this thing than we imagine 'other' countries are".