Iran dominates the the world of Shariah finance. More Shariah-compliant financial assets exist in Iran than in any other nation–by far. The world’s largest Shariah-compliant financial institutions are Iranian banks–all of which are under sanctions for various nefarious activities.
It says a lot about an industry when that industry’s leader is also the world’s most active state sponsor of terrorism.
It’s not surprising then that Iran’s central bank has announced that it is holding its 25th conference on “Islamic” banking: