I think Cassius Clay could be an excellent black leader in the MDP.
Well there is this video, which fits perfectly with the RU's opinion on race mixing:
also in the description exists a bunch of various scriptures that can be used by the RU for why race mixing is bad like:
Deuteronomy 23:2: "A bastard shall not enter into the congregation of the Lord; even to his tenth generation shall he not enter into the congregation of the Lord."
Nehemiah 13:1-3 "On that day they read in the book of Moses in the audience of the people; and therein was found written, that the Ammonite and the Moabite should not come into the congregation of God for ever; Because they met not the children of Israel with bread and with water, but hired Balaam against them, that he should curse them: howbeit our God turned the curse into a blessing. Now it came to pass, when they had heard the law, that they separated from Israel all the mixed multitude."