This is the root cause of the issue rov1200. It is not possible to take issue with the approach of a section of a society and take it upon yourself to eliminate their power and influence under some dubious notion of 'protection' of your own citizens.
When the Russians abandoned their attempt to subdue Afghanistan (surely a history lesson there?) the Afghan people were desparate for someone to take charge, restore order, and frame a system of society that people could live with. That 'someone' appeared, and they are the Taliban,
The fact that as a democracy, we may find the Taliban's approach abhorrent does not in any way justify our attempts to erradicate them, and more than Muslem fundamnetalists' hatred of western views entitled them to blow up buildings.
We should pull out, and as soon as America and Britan can convince the elctorate that we have some sort of 'victory' (Pardon me while I laugh and cry simultaniously) we no doubt will, and the money and lives lost will have counted for nothing - as they were doomed so to do from the start.