Exhibitions should be accessible, inclusive and relevant - but there are often problems with the implementation. "Wonderwalls" in Düsseldorf and "Susanna" in Cologne show how it's done.from Alexander MendenThe front wall of a gallery in the NRW-Forum Düsseldorf is hung as densely as a baroque chamber of curiosities: portraits of Hitler with a Dalí moustache, Donald Trump as a clown, a framed poster that demands: "Don't work with assholes". "Heavy Heads" arranged one on top of the other, three sculptures...
