So, could Germany go fascist/authoritarian after WW1? What I'm thinking is that, after a very late CP victory (say, due to a succesful Kaiserschlacht) an endless insurgency in former Austria-Hungary (which I don't see surviving with a victory that late) and the eastern puppets and economical crisis, people gets fed and the communists get elected in the elections. The army, with support of the Kaiser and help from rightist militias (a la Freikorps) enforces martial law and a civilain/military "National Salvation Government" gets installed in power, which gets more and more nationalistic and interventionist (economically speaking) to face economic crisis and leftist movements at home and abroad, until it's basically the more radical wings of said civilian government (the ones we would call fascist) take control.
So, is that plausible at all? Could the situation in Germany get so bad, and would fascism (or whatever it's called TTL) get so popular?