More:

"Teaching employees that dissent on issues of public concern is something to be feared, rather than encouraged, is a dangerously counterproductive use of scarce security resources, making us less safe as a democracy," Northern California ACLU staff attorney Ann Brick and ACLU Washington national security policy counsel Michael German wrote in the letter to Gail McGinn, acting undersecretary of Defense for personnel and readiness.

"DOD employees cannot accomplish their mission of protecting our nation and its values unless they understand that those values encompass the right to criticize our government through protest activities," they wrote. "It is imperative that they are taught the difference between political, religious or social activism and terrorism."

Hey Lexica! It seems, that you are terrorizing the system in writing and clipping here!
If McCarthy were still alive, he would name you a commi!

This just continues a tradition going back forty+ years, in which the FBI branded protest and civil rights groups as "subversive". They infiltrated such groups, and their agents tried, and sometimes succeded, in goading them into extremeism and violence. Local police departments were encuraged to do likewise - New York had its "Red Squad", and other cities had similar units.