Plenty of evidence that we armed Syrian opposition groups before working out which ones were "moderate" and which ones were ISIS. Thanks William Hague.
No but there is actually a large government programme to dissuade radicalisation. Although ultimately it boils down to the American and Saudi jets will probably kill you with bombs not long after you arrive in Syria.
At what point does a British Muslim teenager become "terrorist scum?" It's not helpful if the authorities use that language as we are trying to dissuade them from joining ISIS not hasten their conversion.