Happy to kill themselves by hanging on the side of an aeroplane, but not willing to stand and fight for their country.
The problem is most of the country are probably pro-Taliban, or at the very least sufficiently scared that they'll just roll over for them. Why wouldn't Muslims want to live under Islamic law though? What happened to the 300,000 strong Afghan army? they probably linked arms with the Taliban the moment our troops left and now Afghanistan is a bigger fortress than it was in 2002.
It was a stupid war from the start, absolutely unwinnable. Just a massive money-sink. I'd be looking at who pushed hardest and profited from it.