“Our leaders overlooked this degrading and inhumane act of American soldiers because they are interested in peace talks,” said Mullah Mohammad Gul, a local Taliban commander in southern Helmand province, where the video is believed to have been made.

“Our duty is to defend our sacred religion and our people and we will keep fighting, no matter what.”

Insurgent fighters in other parts of the country said the video could undermine discipline and push foot soldiers to ignore orders from higher ranked fighters.

“Until now, we were following guidelines and principles laid down by our senior commanders for us to follow while fighting,” said Babar, active in Afghanistan’s eastern Nangarhar province.

Young insurgents might ignore orders in future, he added.