During the time of BMF, was there some african-american groups that as powerfull as them?
BMF were not powerful. contrary to popular belief,they were not involved in crime. BMF were a record label. the name was not BMF but "BMF Entertainment". the book "BMF Rise & Fall of Big Meech" was 99% fiction. the author Mara Shaloup writes for a tabloid newspaper called Creative Loafing,it's the same as National Enquirer. everything in the book was sensationalized, and exaggerated. it's not a reliable sauce, and neither is Wikipedia. when you do a google search on BMF, the first thing that comes up is the fake Wikipedia page,full of false information. And after that it's the book,which belongs in fiction and not the true crime section. and when you look up BMF online what you'll moastly find are dozens of hip hop websites talking about BMF. notice you'll never find any actual news articles,or crime writers discussing BMF,only gossip columnists and entertainment sites.
