Winner
Diverse in Unity
Sure they had. It was called the 'Holy Roman Empire of the German Nation'.
HRE =/= modern (1930s) day Germany. The regions inhabited by Sudeten Germans were always parts of Bohemia/Moravia as unified administrative units. The notion that "Sudetenland" was a region was simply totally wrong from the beginning and the Nazis proved it when they just added most of the acquired territories to existing gaus in their Reich.
In 1938, Germany had absolutely no right to demand anything from Czechoslovakia. That said, it had a much better claim on the Corridor/Danzig.