The Islamic State probably judged that they were spreading corruption upon the earth. “Indeed, the penalty for those who wage war against Allah and His Messenger and strive upon earth corruption is none but that they be killed or crucified or that their hands and feet be cut off from opposite sides or that they be exiled from the land. That is for them a disgrace in this world; and for them in the Hereafter is a great punishment.” (Qur’an 5:33)
“Daash Cut Off Hands Of Five Young People in Mosul Because Of Smoking,” National Iraqi News Agency, March 11, 2015 (thanks to The Religion of Peace):
Mosul / NINA / Elements of Daash cut right hands of five young men in Mosul, because of smoking.
Witnesses told the National Iraqi News Agency / NINA /: “The elements of Daash cut off the hands of these young people amid al-Jazaar region, west of Mosul, before the public, and taken away to an unknown destination” ./ End