Interesting article on a few points.
First, there is a group called 'Black Hebrews' in Oakland (I think), all Black of course, who are basically thugs and a 'gang', who claim that every figure mentioned in the Bible was in fact Black. They are antisemites who call themselves Jews, (if you can believe such a thing could ever exist). They are militant and are not normally allowed to enter Israel. Their thing is that all Jews are Black people, and the actual Jews are all liars. Silly nonsense. But, people buy into it.
However, there are real Black Jews. There were airlifts from Africa to Israel of Black Jews.
Also, I am not sure what a "Chief Rabbi" is? A Rabbi is a rabbi. Maybe they sit on the Bet Din and conduct weddings and divorces an property settlements. I guess?
If you are in fact a Rabbi, witch in this case is questionable to say the least, then I am not quite sure what would make you a "Chief", or who or what would determine that you are, in fact, a "Chief Rabbi"? I don't even know what that means?
There have been Rabbis who were very much revered, respected, and in some cases almost worshipped, but I never heard them called a 'Chief'. Maybe it is just me.