I get where you're coming from. Trust me, I do, however, this particular solution is not applicable to our unique situation where these 'potential' terrorists can be fixed by filling some sort of vacuum in their hearts and minds. We are not dealing with your standard IRA/PKK sort of terrorists with some beloved political agenda that is bothering them and giving them sleepless nights. It's mostly way more complex and involves core religious beliefs.
Have you ever tried reverse engineering a Wahabized-Deobandi? Try to teach him/her that other sects are not 'Kaafir'? You'll need at-least two life times to accomplish it, that too is a big maybe. . My friend, there are different types of indoctrination, and the one we are dealing with can not be simply wished/washed away with a deprogramming camp. IMHO, only way to 'de-program' these religious lunatics is by scare-tactics only (as also suggested by
@Irfan Baloch). Only absolute fear in their hearts and minds can scare them into submission. Anything short of that, you'll have a time-bomb on your hands......