They could just have stopped killing people at some point in the past 20 years?I genuinely don't believe there would have been a peaceful exit strategy for the Taliban when it comes to dealing with the US war machine. Can you envisage it?
Not that I'm suggesting they were searching for one, through.
Maybe going back to 2001 is they've stopped violence immediately it would have just meant that the US never left and never permitted people with fundamentalist religious beliefs into government, but I think after a while with political pressure they would have had to. Mass demonstrations every week would force even the US to rethink things after a while even if only to avoid press criticism at home.
Certainly since the 2020 agreement they showed no signs of letting up on attacks against government forces, even when the US was already committed to leaving. If there was any time they could have pushed for political influence peacefully, that was surely it, but they carried on killing.