If they kill civilians to advance their cause, they shoot be hunted and killed just like any terrorist.
agreed
here is just a small list of their cowardly terrorist attacks
http://en.wikipedia.org/wiki/Warrington_bomb_attacks
http://en.wikipedia.org/wiki/Attacks_on_the_London_underground
http://en.wikipedia.org/wiki/Birmingham_pub_bombings
there are the same group who has helped the FARC in columbia to getting weapons from Libya and helping the PLO