Then that chunk should find a means of peaceful coexistence with the west and the east. If they want to get back to their old habits, not just Afghanistan, even Pakistan and to some extent India, Iran and China will suffer.
Yes but remember, remember, that the Taliban are ex Mujhadeen, which was a force that knows only how to be barbaric.
That being said, they never did anything to the Americans, they live in the only way they have lived for millennia in their own little space, it's the Americans who killed their people, that's the root of the mess, that's what stirred the hornets nest.