This is interesting, but most of the priorities listed in this survey aren't what would generally be considered liberal or conservative priorities; these are mostly vague campaign platitudes. Though I happened to come across an old article the other week, that was written when the primaries were still taking place, which suggested that African American voters, despite being overwhelmingly Democratic as a bloc, are not monolithically liberal and are arguably to the right of your typical white Democratic voter. They might not always like the Democratic Party or agree with it or support the direction it embraces in terms of what gets prioritized, but they vote consistently for Democratic candidates because they have no incentive to support Republicans instead.
I'm not sure how much truth there is to that theory or if it factors into this poll in any way, but I thought it was a neat take.
Age, generation, and regions have a lot to do with that. Obviously a middle-age black family in Mississippi is going to have different views culturally and economically than a young black student at a metropolian university.