The truth is, anyone can be a terrorist. The face of terrorism today is as varied as the faces of the world. While it is true that we must be concerned and alert to foreign threats, we must also look within for those who would resort to violence or terrorism to further their personal, political, religious or philosophical beliefs through extremist activities. AR 600-20 Army Command Policy, Para. 4-12 expressly prohibits participation in extremist organizations and activities by Army personnel.
Commanders have broad authority for dealing with violations.
Any soldier involvement with or in an extremist organization or activity, such as membership, receipt of literature, or presence at an event, could threaten the good order and discipline of a unit. Every service member has taken an oath of allegiance upon enlistment or commission into the military. Part of that oath states, to protect and defend the Constitution from all enemies foreign and domestic. Service members must avoid and report any suspected violations to their commanders immediately. There are many different extremist organizations in America.