I base my speculations not on the Taliban, but on the fear of those nearly trapped in Kabul by the Taliban. Fear is a motivating factor here.
What better way to spare yourself and family than to offer up a captured Western? The Taliban has been publicly executing any government officials and security members in Cities and Towns that have fallen to them accroading to those who have made their way to Kabul.
There is going to be bigtime slaughter and bloodshed.
Jesus weeps.