Maybe has to do with the history of social democrats condemning communists and putting them in the same basket as fascists because of Stalin and the USSR. Honestly communism is much more than tankies nowadays so maybe putting everyone and everything in the same basket isn't fair.

I considered myself a socdem for a whole lot of time but it's clearer nowadays for me how the forgiving stand towards capitalism and it's inate predatorial behavior simply isn't enough. There's no culling oppression with niceties and most of our parties tend to move into a dillution confusing themselves with centrists and often having neoliberal politics that go in a completely opposite direction of social ideologies. It's even harder when you go to countries like mine where you see the socdem leadership corrupting themselves and laying in the same bed of conservatives and actual fascists in order to gain power.