Barry,
I believe that the opinions of senior (and highly experienced) military officers such as Colonel Richard Kemp need to be taken seriously.
In a fight such as this one, stern measures are called for; ones that any Western democracy would not usually take. However, during the Malayan Emergency (1948-1960), Britain did legislate a series of "Emergency Regulations" which were used in its (ultimately successful) 12 year long fight against a Communist Insurrection. These regulations allowed for such things as deportation and / or internment - the same measures that Richard Kemp is advocating now. Furthermore, under the circumstances of an insurgency type of war (in which the Asian population was being terrorised by the Communist forces), such measures were considered acceptable.
Although this was a fight against a political rather than a religious ideology, there are in fact more than a few similarities between religion and the more extreme of political ideologies. Certainly the more die-hard Chinese Communists in Malaya exhibited a level of extremism very similar to that of the current crop of Muslim suicide bombers. (This fact often attested to by the ex-servicemen who fought in the Malayan Emergency). Also, in the wider Communist-versus-the-West conflicts in Asia during those decades of the 1950s and 60s, the suicide bomber mentality was never far away. (See, for example, Bernard B. Fall's Hell in a Very Small Place: The Siege of Dien Bien Phu, in which he describes the activities of the Viet Minh's "Death Volunteers". Also, for an informative read about suppressing a Communist Insurrection, see both Noel Barber's War of the Running Dogs and Sir Robert Thompson's Defeating Communist Insurgency: Experiences of Malaysia and Vietnam).
There are a number of parallels between religious fanaticism and political fanaticism. Likewise, the fight against one shares certain similarities with the fight against the other. Colonel Richard Kemp has identified two such similar components - i.e. deportation and internment.
Furthermore, emergency measures such as these can be applied in a Western democracy without it having to revert to barbarism - and without having to therefore betray everything that Western Civilisation stands for.
As others here have already reminded us, though, action now needs to be taken quickly (make that bloody quickly!)
