Any religion can be compared to the attic of an old home. Unless the attic is regularly cleaned, it gathers dust and cobwebs and eventually becomes unusable. Similarly, if a religion cannot be updated or cleaned from time to time, it loses its usefulness and cannot relate anymore to changed times and people.
The 'pre-emption' versus 'prevention' debate may be a distinction without much difference. The important thing is to have it understood that the United States is absolutely serious. The jihadists have in the past bragged that America is too feeble and corrupt to fight. A lot is involved in disproving that delusion on their part.