The difference is that Europeans there were at least partially civilized so there was some raw material to work with.
The Taliban have nothing of civilization in them. They actively resist and hate civilization. There is no reforming them.
You also underestimate the amount of hatred a local person of sane mind would have against the Taliban. The most rabid haters of any shitty system are often those who escaped it personally. If you can supply and support such people they would be much more violent and extreme in suppressing the Taliban than any external Western person could be. If we are taking the example of Nazis, just look at the attitude of Jews who survived and began assassinating Nazis after the war vs American etc liberators who just chose to "forget" everything after the war.
The Taliban have nothing of civilization in them. They actively resist and hate civilization. There is no reforming them.
You also underestimate the amount of hatred a local person of sane mind would have against the Taliban. The most rabid haters of any shitty system are often those who escaped it personally. If you can supply and support such people they would be much more violent and extreme in suppressing the Taliban than any external Western person could be. If we are taking the example of Nazis, just look at the attitude of Jews who survived and began assassinating Nazis after the war vs American etc liberators who just chose to "forget" everything after the war.
https://en.wikipedia.org/wiki/Nazi_hunter
https://en.wikipedia.org/wiki/Nakam