The picture is famous and I don't take a view as to its authenticity. I do however, find it strange that the provenance and/or authenticity of the picture is being questioned now instead of say, 40-50 years ago in the immediate aftermath of the war. I suppose it is possible the picture was faked, but improbable. War fever was as high in Germany in 1914 as it was in every other country in Europe so it is not surprising that a young PRE-NAZI Hitler would be at a war rally, just about everybody else that could go was there too.