You should probably read Karls works and his successors works like:
- The Motorcycle Diaries
- The Jewish Question
- Das Kapital
These were written within ideological contexts and contain things that we would consider hate speech today. Very much perpetuating ideas like:
- lazy Mexcians
- Jewish world conspiracy
- Black people (he would call them the n-word) being closer to the "animal kingdom" than man.
And they did all of these in ideological constructs.