Complex sentence: Hitler often called on the German public to sacrifice all for the cause of their great nation, but his regime did not create German nationalism: it merely capitalized on an intrinsic cultural value of German society that still remains prevalent even to this day.
Split into simpler sentences: Hitler often called on the German public to sacrifice all for the cause of their great nation. He merely capitalized on an intrinsic cultural value of that society that still remains prevalent even to this day.