Yea ill admit the right is a bit stronger on free speech than the left. Hate speech is a good point in that regard. I will admit the left is more likely to have a person suggest hate speech should be a crime, and that is less likely a statement to come from someone on the right.
That said I suspect a small minority of the left think people should be criminally guilty for speech alone that is not a direct call to violence.
That said, "We should kill all black people" is legit call to violence (and hate speech).. So there is a bit of a cross over. But yea non-calls to violence that are hate speech is the only place I think you might get a few liberals.