What religion where the angry black fellas yelling about in Philly?

i was on a trip to Philadelphia last nov. and walked past a group of Kembo lookin black fellas, with fuzzy beards, bald heads, in leather armor, some had staffs (like a wizard or something) yelling about how "Jesus is the Antichrist" and "whitey is lyin to you". what religion where they preaching about? and who are these people?