She doesn't want to undermine her religious beliefs.... 

 Your Armies are in Afghanistan killing her brothers to give her the freedom to not wear the traditional dress, but if she chooses to wear it and abide by its traditions, then its too much trouble for you...

 Balls.... you dont find it too much trouble to go across the world with armies and slaughter thousands of people to defend her rights....  but when it comes to respecting her right to not compromise her faith, then you kick her out of your school.

This exposes the lie that we are in Afghanistan for personal freedoms, and the lie that she is just too much nuisance. Admit it its about Muslims and a prejudice against them.