The terrorist is responsible for terrorism, this person has been fooled or fooled him/herself into thinking that killing someone or a group of people will change things.
Killing a person is easy...changing the way a society views the world is not.
Terrorism is what we call it, maybe the terrorist call it war, would it be ok if it was war? Maybe the terrorist call what my country (USA) does terrorism...we bombs on people without warning isn't that terrorism? Innocent people die on both sides...the fact is that propaganda makes the other side bad and your side good most of the time.
Who really knows the truth?
Who is qualified to judge such things?