New Cadillac chief Johan de Nysschen went to Facebook to criticize critics: “Mary Barra and Dan Ammann have been very explicit in their instructions: restore Cadillac to the pinnacle of global premium brands, not in sales but in aspirational brand character." And, on setting up Cadillac as a separate business unit: “Emails from GM [retirees] [suggest] that is the dumbest idea since the Cimmaron. I quietly wonder if any of them had a hand in creating that masterful monument to product substance.” More choice words at the jump.