An American-born Islamist who rose to the top ranks of Al Qaeda warned ISIS fighters that their horrific killings of fellow Muslims means they will be punished in the afterlife. Adam Gadahn, who was born in California but became known as Azzam the American after fleeing to the middle east to join Al Qaeda, made the remarks in an interview with the group's magazine. Gadahn was killed by a US airstrike back in January, but it is believed the interview was conducted last autumn and not published until now. In it, Gadahn warns the followers of ISIS that the 'crimes' they have committed against their fellow believers 'cannot simply be overlooked or forgotten'.Adam Gadahn spoke in interview with Al Qaeda's magazine ResurgenceCondemned barbarity of ISIS, saying their 'crimes' would not be forgottenAlso blasted killing of Briton Alan Henning, saying he didn't deserve to dieHowever, he did praise Al Qaeda attack on Twin Towers which killed 3,000
While ISIS and _ share many of the same founding principles and aims, a deep rift has opened between the two groups in recent months.