I have a very weak sort of expertise on far right violent extremism. It was the thing I was writing about in Europe, and that kind of got me into a bit of trouble which is a somewhat lame story.
But be all that as it may be, don't listen to me.
Listen to The Southern Poverty Law Center, and the nice Republican Morman man who used to work for the Department of Homeland Security. You think the real terrorist threat is Al-Quaeda? Mmmm, think again.
http://www.splcenter.org/get-informed/intelligence-report/browse-all-issues/2011/summer/inside-the-dhs-former-top-analyst-says-agency-bowed