Some are, just like other crimes. There just isn't very much terrorism outside of civil war/independence war type situations. It's not a common type of violence

Some are, just like other crimes. There just isn't very much terrorism outside of civil war/independence war type situations. It's not a common type of violence. It never really was. Just try applying the same logic you apply to other horrible problems which are dealt with but never fully eradicated. Pedophilia. It's a crime. Many cases are foiled. Many are not.