I’m sorry, explaining the racist history of the Dem Party to blacks is useless. It all comes down to “what are you going to give us?” Pleading and explaining why conservatism is good for them is not something they want to hear.
And based on that the conservative presentation should be blunt and to the point; not in your face, but very short, clear, concise - maybe a little sharp.
Something like - I’m not here to give you anything beyond liberty. Freedom isn’t free you have to work for it. You want freedom, step one is start acting as an independent individual instead of a dependant serf who asks and grovels.