About the side note: There are different factors at play: nostalgia about GDR, Anti-Americanism and the peace movement (not sending weapons anywhere). And I was especially talking about the party "Die Linke" (The Left). Other parties like the Social Democrates and The Green (both part of the government) disagree on that.

There are ML and tanky organistations outside of parliament. But I think the biggest organized left movement at the moment in Germany is the climate justice movement, which is very decentralized but I think most are against Russia. I might be biased though since I'm part of this movement.