As you recall when you were last there, Alexander the Great was passing through on his way to the Indus and the Afghans subverted his conquest through the simple expedient of giving him a tomboyish girl to go hunting with.
Place ain't changed since. If there's been an Islamic influence in Afghanistan, let me suggest it's been the Afghans imposing their own quaint ignorance on Islam and having that nonsense spread around the world.
The highest school, and 75% of their views are shared with the three other Sunni schools.
Islam will be our enemy forever, but thanks for serving, and stay safe!