You are an Algerian-descended foreign fighter from Paris. Your native language is French but you speak fluent Arabic and English. You came to the Caliphate because of your family. They have no interest in Islam, at least not the Islam of ISIL. They want only to assimilate with French society and make money.
When you left school because it was too expensive and your grades were too poor, your family disapproved. When you took honest work on a construction site, they disapproved. When you ran out of money and had to borrow to make ends meet, they disapproved most of all. Meanwhile, the French hated you for your faith and your Algerian background. You got into fights constantly, and your family and the cops always blamed you.

When you started paying attention to the mission of the Islamic State, things finally started to make sense. There was a fight worth having. There was a place you would be welcomed and where nobody would care about money. It was not radicalization, it was revelation.

Your life in the Islamic State has not quite lived up to your hopes. The government spends more time scolding and abusing your fellow Sunnis than fighting the Assad government, the Iranians, or other Shiites. And it has treated you as though you are next to useless. You received only the barest military training and have seen no combat.
Instead, they put you in Al-Hisbah, the next-to-useless “religion police.” It’s almost as if ISIL does not trust its foreign recruits. Meanwhile, the jerks who did a stint with the French Army go right into the action. How is that fair? Joining a crusader army should be treason!
You were assigned to this mission because you know how to operate construction equipment. You’ll do whatever Timur tells you to do, but you would rather be smoking and complaining — despite both activities being offenses against the state, punishable by the lash.

You resent being sidelined when there’s real fighting to be done.

You are an ISIL foreign fighter, short on combat skills but long on being foreign. You have only recently arrived in ISIL. Your first duties were with Al-Hisbah, the religious police. You handed out fines for violations of ISIL’s massive list of proscribed acts, from smoking to inadequate beard length to allowing female family members out without escorts. You had to administer beatings to repeat offenders. Worse offenses were given the death penalty. That wasn’t on you, of course, but more experienced fighters.
You know enough to be wary of everyone around you. Anonymous denouncements can easily lead to imprisonment, torture, and execution without ever knowing the charge or your accusers.