Judicial Watch obtained and disseminated this report from the DHS Science and Technology directorate. The report essentially conflates terrorism and criminal activity into one category, a proverbial foot in the door to treating crime and terrorism the same, meaning more limited 1st, 2nd, 4th and 5th Amendment rights. Those who have a reverence for individual liberty and the Second Amendment are the equivalent of right wing extremists prone to terrorism.
But read the report for yourself.
You can obtain the entire report here.