"black hebrews" are a christian originated cult who belive that their ancestors were the hebrews of the bible , influenced by christian ideas and seeking a way to form their own type of christianity more feating their pro black ideas , they invented this concept , when they learnt that actuall "hebrews" do exist out there , they started calling them "fakes" .
they belive in black supremecy and hate white people , they do however like muslims ( in one of their churches there is a painting of a muslim "messiah" killing the white pope ,for exemple )
they belive that there will be a racial war in the future, and they belive that only someone with black ancestors will be allowed to live after it (cause obviously they belive they can win)
they are Pretty gay ...
there is a small number of them living in israel (they came when the country was formed and for some reason they wern't kicked out ) most of them live in dimona
rabbi meir kahane alav hashalom hy"d did a huge demonstration against them when he came to live in israel
some of them actually converted into real judaism , a singer of the community who converted to judaism reprisented israel in the eurovision contest few years ago
muman - actually noah cursed canaan son of ham (perheps he was the one who did what was done , as rash"i suggest) however it could be on ham as well , but mainly against canaan
"None of the great Torah sages was Black..."
jews are not a black people , thats true(in fact , etiophian jews are clearly semitic both by genes and appearance , they just have black skin because of the enviroment they lived in ,for exemple) , but that does not mean there were no black converts , there were .... i can think of a jewish sage who was black , yithro , father of zippora (wife of moses,that appearntly as you mentioned was black) , further more , the whole family of yithro converted to judaism(perheps he and his wife sons and daugthers , but could be close familiy as well) , they all were jews, and continued to live with israel , they were called "the kini" , and its said that they were "yoshvay ohalim " , which usually mean when said about jews (in the holy books) that they were "sitting in the tent of torah" , as in , scholars
perheps they litterly their homes was usually tents(and there are some text that suggest that ) but still that would usually mean they studied torah
"Besides black is evil in Jewish belief"
care to explain?
about your second message , it seems that kush was a term for a african/black peoples who came from kush , because there is a verse saying " hayaapoch kushi oro ,ve namer haburborutav" ( can a kushite (black man) change his skin ,and a leapord his stripes"