There are not many Egyptian journalists like Ismail Alexandrani. A sociologist by training, he was always drawn as a writer and journalist to those who are marginalized in the excitable hurly burly of Egypt’s press and popular culture: Nubians, disabled people, the Sinai Bedouins. This week, his expertise and erudition have dealt him a grim fate: he has been arrested and is being held incognito on improbable charges of supporting terrorism.