Ok, maybe i misused the wording over here I am sorry.
I should not have called them sects and you are right believer , they are all off-cult sects. Nation of Islam and Submitters are two of them.
The "nation of Islam" cult see Elijah Muhammad as the awaited Mahdi, same as the Shi'ites. Of course their hate masseges and racism against the Whites in the states is unacceptable, and also they self appointed prophet. However, this cult is dying and most blacks are discovering the true Islam . I watched the movie of Malcom-X and read his booklet one time. He is one of those people who were in the Nation of Islam but once he did the Hajj he realized the truth and I believe that is why he was killed by his fellow members from that cult.
"Submission" that is a cult established by Rashad Khalifah. He declared himself a prophet after Muhammad and called himself the Messiah also. He established the 19 theory of the Quran, but as a matter of fact, he deleted verses and changed letters to make his theory work. He was also killed.
Hope this helps.
Peace.