[Gandalf the Mauve]

I haven’t seen any cites for this claim.

[SZonian]

Here, let me help you:

http://michellemalkin.com/2009/04/14/confirme-the-obama-dhs-hit-job-on-conservatives-is-real/

http://vetxprs.org/VetTerrorThreat.html

http://freedomoutpost.com/2012/08/dhs-defines-the-new-terrorists-conservative-americans/

http://www.homelandsecuritynewswire.com/dr20120810-domestic-terrorism-by-members-of-extremist-groups-a-serious-threat-fbi

Google is hard.