1861
The north was fighting to preserve the union, and the slavery within it. Not antifascist, in fact the North was falling all over itself to promise the South that they could keep their slaves. What defeated slavery and led to its abolition was the overwhelming amount of Black slaves who joined the northern Armies, a historic collective act W.E.B DuBois dubbed a "General Strike." The white army guy in the picture says a lot about the political education of the artist.
three arrows
A symbol that originates from the mid-thirties from the SPD, it was painted over swastikas. Each arrow represents the enemies of social democracy: anti-monarchism, anti-fascism, and anti-communism. Consider, the SPD was not able to defeat the threat of fascism, arguably because the party purged all communists from political power.
Rosa Luxemburg was assassinated by the Friecorps, right wing paramilitaries (proto-fascists), enlisted by the SPD to put down the Vorwards uprising. She was "shot in the back while trying to escape" (yeah right), but was only at the Vorwards building because she was trying to prevent a violent coup against the government.
Rosa was one of the first people to call out the SPD for its corruption, which eventually led to the party's utter destruction and national takeover by the Nazis.
Anti communism is capitulation to fascism. If you want to be anti Stalinist, anti authoritarian, that's different since Stalin, himself a moderate, also capitulated to the Nazis via Molotov-Ribbentrop. Stalin was arguably the the most successful anticommunist of the 20th century, the "grave digger of the revolution."
If the SPD had allowed the communist movement to flourish, and aided the Russians against the bourgeois capitalists that invaded during their civil war, there would have been no Stalin (I'm not convinced Stalin's Comintern didn't intentionally sabotage this plan of Lenin and the pre- revolutionary Bolsheviks, just like they sabotaged the American communist movement) and there would have been no Hitler.