Yes.  It is useful to think of them as destructive cults (with political and/or religious orientations) which advocate the use of violence.  Any pyramid structured authoritarian group which uses deception and mind control to recruit and indoctrinate their followers is a destructive cult.

Members of terrorist organizations are programmed to think in simplistic black and white, us-versus-them terms.  They depersonalize and demonize their enemies.

It is crucial that we understand how cults function in order to help neutralize this grave threat to the world.