an ethical dilemma

Before you read this one, read the comment by the Great Lefty in response to my post on the commies. GL had suggested targetted assassinations as an alternative to wars for two very simple reasons - to save money and to save lives. Here is another time-tested alternative to war - exile! Of course, it is abhorrent to let a monster get away, but is bringing him to justice worth thousands and thousands of lives apart from all the economic, social and other damage? For example, was the Afghan war really necessary if getting Taliban out was possible another way? Would make for a great ethics case in business school, but this deserves more serious treatment than a bunch of kids earning class participation points!