Neither of your assertions are supported in the story.
"The FBI says the national movement has been around for decades and has ties to the Nuwaubians, a black supremacist group that started near Augusta. Nationally, sovereign citizens, which originated as a white supremacist group, have been connected to multiple insurance fraud and tax evasion scams, along with some violent crimes."
You have to read deep into the story to find out. Lots of people would just see the headline and lead paragraph.