a) They are philosophically deranged (by their public behavior)
b) They are one step short of becoming radical islamists or radical-islam aligned
c) They are US citizens so they can blend in to avoid 'profile'
d) They have a history of getting very close to the President, the Vice President, Secretary Rumsfeld, key Senators and Congressman, and they have been violent about it
e) Their prime operational area is Washington D.C.
Therefore, were I an FBI analyst, I would assess them, Code Pink, as a national security threat.
AMEN to that