Holy shit really? I haven't heard this. Have any sources? I have been monitoring their activities for over a decade and they regularly make a habit of harassing and threatening people on the streets and there have been some documented instances of them being violent. I tried to have a discussion with one of them that ran a channel dedicated to their tripe on Youtube back in the day out of curiosity. He wouldn't talk to me until he could confirm I was of an appropriate racial heritage. They are a bunch of supremacist loons and I am not surprised they are becomming radicalized into violence as they regularly talk about murdering and enslaving "Edomites" aka the "whites" in their street rants.
These nuts apparently have been around for a long time though I was also surprised when I first heard about the group. Blacks in America have serious identity issues. First they were claiming they were the original Egyptians that built the pyramids. Then they started claiming they are the original Native Americans and Aztec and shietz. Now they are the "original" Israelites.
Apparently there's not enough people online debunking their delusions and groups like these tend to attract equally delusional people anyway. Guess the media would not try to call them racist or anti-Semites since they are blacks.