Just because you don't know what terms mean doesn't mean the person you're interacting with is a troll. Socialist, especially in this context, has a lot more to do with the economic order. That's why socialist democracy is not an oxymoron, nor is capitalist-autocracy for example. Dictator-democracy is not even similar, because you're abutting two governmental structure systems, not one governmental structure system with one economic system. Dictator-democracy and Capitalist-Communism both don't make sense as terms. Socialist democracy absolutely does.

If you want to argue the veracity of the claim that they were a socialist democracy or not, go for it. But as it is, you are the one trolling here, either purposefully or just inadvertently due to not understanding what you're responding to and thus assuming the person you're responding to is speaking nonsense.