The social fascism line was because it was the SPD that crushed the 1919 revolution not the libs. Friedrich Ebert and the higher ups in the SPD used the Freikorps to crush the revolution and assassinate Luxemburg and Liebknecht.
I am guessing that the meme has in mind Hindenburg appointing Hitler as Chancellor and the liberal party voting for giving emergency powers to Hitler, post Reichstag fire.
The social fascism line was because it was the SPD that crushed the 1919 revolution not the libs. Friedrich Ebert and the higher ups in the SPD used the Freikorps to crush the revolution and assassinate Luxemburg and Liebknecht.
I am guessing that the meme has in mind Hindenburg appointing Hitler as Chancellor and the liberal party voting for giving emergency powers to Hitler, post Reichstag fire.