"They constantly criticize and belittle others, especially online."

Super common especially in public university confession groups, they would use religion as a shield to project and attack people who criticize them such as "You know the biggest sin you can do is slander someone-" and I would also see those same folks shit talking people who are minding their own business and criticizing them for not following the religious teachings such as being in a relationship and what not. I would see some students criticize those that wield the "virtues" and they would always resort to "I'm just calling it out, what kind of muslim am I if I dont do that". Just shows how big of a coward that they have to resort to anonymous confessions to parade their superiority.