A US Department of Defense training manual describes protest as "low-level terrorism." This is part of a broader trend of state agencies characterizing protest as a form of terrorism.
The first question of the Terrorism Threat Factors, "Knowledge Check 1" section reads as follows:
Which of the following is an example of low-level terrorism activity?
Select the correct answer and then click Check Your Answer.
O Attacking the Pentagon
O IEDs
O Hate crimes against racial groups
O Protests
The "correct" answer is Protests.
DoD Training Manual: Protests are "Low-Level Terrorism
(via Isen)