Do you think there will be studies about the right wing nature of predominant German liberalism? What would they study? It is a historical and political question and one that most people cannot even frame, as they do not know the properties of fascistic thinking. The German government is even cracking down on Marxist reading groups! Any critique like this will be a social one and the evidence will be German society and its state.

You can start getting an inkling by asking Germans of Turkish descent how racist the country is. They will talk your ear off. If you need studies I am sure you can find a number on the brown immigrant experience. Islamophobia. Or even just look at the German state's embrace and defense of yet another genocide against the vocal minority of anti-genocide Germans.