Truth is truth no matter the origin of the person who speaks it.
To discriminate is racism.
Everything doesn't have to be about Africa. Some biblical things are universal. The Bible is the rallying point of humanity.
I don't see the problem with the pictures you posted. What if I was to quote Gadman on the same topic?
"The 12 Tribes of Israel is seen as closer to Christianity than other Rastafarian groups. Is there a basic difference in the doctrine?
"Yes there is a basic difference because we see Christ, and that die and rose again, and that die for our sin, we see that person. So that is, you know, a different teaching, because is not many see this teaching, that Christ is the person."
Irie FM Interview with Gadman of the Twelve Tribes of Israel
I could even mention that Elder Gadman encourages us to read the Metaphysical Bible dictionary. It isn't YouTube but the writer looks Anglo-Saxon to me:
Wikipedia on Charles Fillmore