After all, the purpose of moral disapproval of atrocities is simply to avoid offending anyone who could be personally connected to them

That's absurd. When I disapprove of Serbs (and Greek volunteers) massacring civilians in Srebrenica, it's not because I want to avoid offending people, it's because I want to offend them into shame, so that they stop supporting policies and parties in my own nation (Greece) that will make a repetition of the butchery and support of such butchery, likely.

You talk as if all discussion of politics is a signalling of status, rather than a sometimes hopeless attempt to influence the future into a better direction.