Doctrine can all too quickly become dogma and the dogmatic system is unlikely to prevail in purely military terms. The killing of innocents acting as a recruiting sergeant isn't a 21st century, non-western phenomenon.
Before debating the doctrine and tactics of any campaign we should establish why we (ie the politicians) wish to undertake an operation and what success will look like. Once that has been done (selection and maintenance of the aim) we can decide on the appropriate TTPs to meet that aim. If we can't articulate or define what success will be, how can we then select the appropriate methodology to achieve success?
MB