Any Historian worth his salt would never utter the Blasphemy that Austria is not German.So you agree with me that Austria is part of Greater Germany
Read up on European History bro. Austria was the dominant German power until the Kleine Deutschland policy of Prussia defeated the Hapsburgs in the 19th Century. Before that, Osterreich reigned supreme over all other German States and was the head of the German Holy Roman Empire which was dissolved by Napoleon. The Hapsburgs were opposed to German Nationalism as they led a multicultural Empire. Prussia was less concerned with a plural empire as they had less minorities. They defeated the Austrians and Bavarians paving the way for a more homogeneous smaller German State.
Ironically, both ruling families of Austria and Prussia descend from Royal families which were first prominent in Switzerland and Swabia.