DerScheisser is a great meme sub if you just want to dunk on Wehraboos and Neonazis, but is still predominantly shitlib. It literally bans anyone who says anything positive about the USSR beyond "they killed Nazis". Really goes to show you that Liberals would go through the Weimar motions that put the Nazis in power in the first place again in a heartbeat so long as they stop the commies in the process.
EDIT: Late link.
Especially because the luxembourgian faction of the KPD split from the rest of the party over supporting the USSR line and joined up with the USPD to form the SAPD who were democratic socialists.