I believe Dr Umar is a fed sent to disrupt & divide the black community.

Yes anybody with half a brain can tell you that he is a con-man but it was that simple statement alone that outed him as a fed. One of Castro’s central foreign policy goals was internationalism – the promotion of decolonisation and revolutionary politics abroad. This involved sending troops to fight in wars against colonial or proxy forces on the African continent, as well as supporting those movements with logistical and technical support. Cuba sent troops but it also sent tens of thousands of Cuban doctors, dentists, nurses, health-care technicians, academics, teachers and engineers to the continent and elsewhere. That a significant proportion of Cubans trace their ancestries to west and central Africa (owing to slavery) contributes to this politics. Along with that his political & personal friendship with Nelson Mandela.
“Mandela’s admiration for the Cuban Revolution only grew with time. Cuba under Castro opposed apartheid and supported the African National Congress — Mandela's political organization and the current ruling party. Mandela credited Cuba’s military support to Angola in the 1970s and 1980s with helping to debilitateSouth Africa’s government enough to result in the legalization of the ANC in 1990.”
“Who trained our people, who gave us resources, who helped so many of our soldiers, our doctors?” Mandela said. “You have not come to our country – when are you coming?”

Anybody who has at great risk helped & served your people time & time again cannot be a racist, that leads me to believe that someone powerful is paying him to make such blasphemous remarks.

(Sources https://www.huffpost.com/entry/nelson-mandela-castro\_n\_4400212/amp https://africasacountry.com/2016/11/viva-fidel)