@Thomas,
Did Hitler refer to himself as an Austrian? He was born there but did he emphasize that when he was campaigning for the German people to adore him?
Did Beethoven refer to himself as an Austrian? He studied there but did he refer to himself as Austrian and not German?
Does Ah-nold think of himself as a German? Or a Californian? Or American citizen?
Because of Mozart's family ties with Salzburg, which did not become Austrian until after his death, I am quite sure that he did consider himself German despite his strong identification with Vienna.
My Italian relatives all refer to themselves as "Italian" when referring to the way they speak, cook, eat, relate to each other as family, but they do not think of themselves as Italians from Italy, I don't believe even those who immigrated from there, but all think of themselves as citizens of America. (They also all enormously enjoy Italian jokes.)
And while the dynamics of all that are interesting, what 'ruthless dictator' or any kind of dictator or anybody aspiring to high office of any kind does not attempt to sell himself as one of the people he wants to put him into power?