There's a logical reason that Taliban forces have not been accused of destroying any churches in Afghanistan.

"That's the dirty little secret. There were no churches before the Taliban returned to power," said Nina Shea, director of the Hudson Institute's Center for Religious Freedom and a human-rights activist for 30 years. "Christians were already underground because of the constant threats to their lives, so they didn't have any church buildings to blow up."

Everyone remembers the shocking videos when desperate Afghans chased a U.S. military plane on a Kabul runway, pleading to be among those evacuated. At least two people fell to their deaths after clinging to a plane during takeoff.

Ever since, there have been reports about the dangers faced by those left behind, especially Afghans with ties to the U.S. military, the fallen government or workers in secular or religious non-profit groups that remained behind to continue humanitarian work.

Christians, Hindus, Sikhs, Ahmadis, Shia Muslims and members of other religious minorities are also living in fear.

"They are all on the run. They are all in hiding," said Shea, reached by telephone. "People are being hunted down and beaten and are threatened with death if they don't betray members of their families who are considered apostates" by the Taliban.

It's impossible not to discuss religious freedom during this crisis, she added. "Everything the Taliban does is about religion. Religion is involved when they hang people for violating their approach to Islamic law or when they attack women and girls who want to go to school. For the Taliban, this is all connected."