You have a fairly limited imagination to go with your complete lack of insight into military operations. How about Special Forces training to insert and eliminate "terrorist" threats in modern urban domestic environments. The Pentagon considers Tea Party and Pro-2A members domestic terrorists. How far a stretch is it to imagine under the guise of Homeland Security, a SEAL team, Delta Force, or a Special Forces A team being used to eliminate domestic insurgents?
Were you paying attention to Watertown? 2 domestic terrorists with a couple of home-made pressure cooker bombs and a single Glock brought the Greater Boston Metro to a standstill. 1 dead terrorist and 1 injured terrorist for 1 dead LEO and 1 injured LEO. All while thousands of local, state and federal LEO occupied the area.
You think the government can't do an after action analysis of the outcome? You think the analysts at DHS and FBI aren't looking at the the numbers and extrapolating what happens when 5 or 10 or 20 heavily armed individuals with military training decide to take the fight to .gov? All of a sudden, SF kill teams become much more palatable than local SWAT... especially under the guise of the Patriot Act.