I'm not sure
Haven't been to Ghana, but I've spent a lot of time in both Sierra Leone and Liberia. You really don't see prominent graphic depictions of violence like that anywhere; if anything, all that extreme violence is repressed significantly. Especially in Liberia, you just do not talk about the civil war in public. But it's still very real - everyone there knows who killed who, who ate who, etc. I'm guessing the relatively safety and more urbane culture of Ghana lets them enjoy that kind of violence somewhat more ironically.
I am pretty sure Studer is thinking of Poland.