Terrorism is a co-ordinated attacks aimed at generating feelings of terror against a people. Unlike war, acts of terrorism are not subject to the procedures of the war such as execution time which is always a sudden and random targets and casualties are often civilians.
The term counter-terrorist experts said referring to the perpetrators who are not members of the armed forces, known or not to obey the rules of the armed forces. Acts of terrorism also implies that the attack a terrorist attack carried out inhuman and has no justification, and therefore the perpetrators ("terrorists") deserves a cruel revenge.