http://www.mangago.me/read-manga/bloody_monday/ The main character battles the terrorists in the first installment, but becomes a terrorist himself by the 3rd season.
http://www.mangago.me/read-manga/akumetsu/
http://www.mangago.me/read-manga/destroy_and_revolution/
There's a lot here and some to sort out.
http://www.mangago.me/r/l_search/?page=1&name=Terrorist
http://www.mangago.me/read-manga/fisheye_placebo/
Can also try watching the Code Geass or Zankou no Terror anime. Ghost in the Shell's also good, though it's about combating terrorists.
ooohh~ thanks ლ(´ڡ`ლ)
Do you guys know any mangas that are about terrorist. Something like terror man would be really good!!