Every genuine prophet has the word of God specific only to his own people's causes and conditions!
Prophet Moses had the word of God specific to the causes and conditions of the Children of Israel/Jewish people four thousand years ago living under the oppression of Pharaoh.
Prophet Muhammad had the word of God specific the conditions of the Arabian people living in Saudi Arabia 1500 years ago.
Prophet Harry have the word of the same God specific to the causes and conditions of his Black American people living under the oppression of White Americans today!
The White Caucasian Christian Bible have the word of God, but it is not the word of God from our Prophet Harry specific to Black Americans.Similarly, the Arabian Quran have the word of God, but it is not the word of God from our Prophet Harry specific to Black Americans since we are not Arabian people.Therefore, Black Americans cannot be guided by the word of God given to a prophet of another race.
I don't think what I have just explained is difficult to understand!

Causes and conditions. You are halfway there Harry.