KBF makes a good point.
Without evidence retaliation is illegal and immoral, however much we may hate, despise and suspect OBL and the Taliban.
Without evidence, and without concrete action to get the moderate Islamic world on side, it will also only serve to inflame the situation.
Until these conditions are meant, 'hitting back' remains a cynical, vote-grabbing and ultimately cowardly way for Shrub (Bush Jr) to keep the redneck faction on board. Britain should have no part of it under these circumstances.
Find the evidence, make it something more and better than a bit of Moslem bashing and it (and Bush) has my full support.