"The idea of making peace in the middle and let it spread to the wings of the spectrum makes sense in Norwegian domestic politics, maybe excluding only five to 10%. If you exclude more than 50%, the failure is imminent. The process did not die, it was still born.
But I would like to add a point: Please don�t see this as something particularly Norwegian. The focus on two parties trying to make a deal is a part of an unfortunate diplomatic tradition. The desire to broker a deal is so high, for all kinds of reasons, that third parties are easily blackmailed: "If you invite those people forget about any facilitation."