Like this 2015 report from the FBI that notes it's all internet fear-mongering? https://info.publicintelligence.net/FBI-MilitiaTargetingMuslims.pdf

In fact not a single credible source lists any State Department or FBI report about this group since 2000 when the State Department de-listed them from their terrorist list due to long-term inactivity. A nation-wide public records search finds not a single primary-source document listing this group as being involved in the commission of a violent offense in the last 20 years.

You say that I need to find direct sources, I've linked an FBI report and looked only for credible primary source documents, of which there is none. What I have found is a lot of right-wing fear-mongering internet sites that are uncredible and rely on unnamed sources spouting dubious allegations. Do some independent research and stop reading Brietbart for your news.