I was in Germany from 1980 to 1984. I was also amazed at the number of leftists there too. I am not sure how much of it was due to Soviet propaganda, and how much of it was just their own brand of left wing politics, but it was there. Maybe not much has changed since the 80s.
Regrettably, the communist legacy of Rosa Luxemburg did not drown with her in the Landwehr Canal in Berlin in 1919.
I was stationed in Germany 1981-83. The Left in FRG was Baader-Meinhof & anarchists & every town had its Karl-Marx-Strasse. Better Red than dead was their slogan.
Bridges & autobahn overpasses had built-in niche holes in which to place charges to blow them in case of invasion. Lefties started filling these in with concrete to prevent that. But after locals began watching the bridges & beating the hell out of them, that stopped.
Germany has a much bigger muzzie problem than a commie one. Putin doesn’t need the Red Army to threaten Germany, he has Gazprom.