Corrupted by the enemy, always a problem with occupying forces.
The American version of this is "Your Job in Germany".[1] This was made for US occupation troops in Germany. Directed by Frank Capra and written by Theodor Geisel ("Dr. Seuss"), an unexpected collaboration that seems to work. The message: "You are in an enemy country. Take no chances. No fraternization with any of the German people."
It's become harder to view this video. The YouTube version, uploaded directly by the US National Archives [2], is now "age restricted". Of the Internet Archive versions, only the Ogg Vorbis version is still playable.
See it now, before the Thought Police delete all the copies as "hate speech".
Understanding what went wrong after WWI is helpful in understanding what went wrong in Afghanistan. It's not directly comparable, but it's important to know that the US had, in the past, changed minds and societies by military force, successfully.
[1] https://archive.org/download/YourJobInGermany1945/YourJobInG...