On a typical Friday at midday, the racks at the entrance to the Dedeman Mosque in northern Istanbul would be full of shoes, doffed by members of the congregation before they enter the building for the most important Islamic prayer of the week. But when Turkey suspended mass prayers in mid-March, to try to stop the spread of the COVID-19 pandemic, those racks stood empty. And as businesses around the city shut their doors, the mosque’s young imam, Abdulsamet Çakır, knew that the pockets of some members of his community…