The list is rather finite, both in scope and depth. Admitting that there'd be a huge drop in the number of persons engaged in "global terrorism" if political adjustments of a sort were made is politically inconvenient quite often; it doesn't change the fact that it would be effective as it has proven to be in a great number of contexts. Eliminate entirely? Terrorism is a tactic, so waiting for it to disappear entirely is like waiting to see a fairy godmother wave a wand to make a pumpkin into a carriage.