It’s rare these days for a turbaned cleric in Homeland to attract a large following of adoring young fans on Instagram, but Sayed Mahdi Tabatabaei has done it by rescuing street dogs in defiance of a local taboo.Tabatabaei posts regularly — to his more than 80,000 followers — heartbreaking stories of abused and neglected dogs that he has treated in his shelter. His young fans ask for updates on the rescues and send well wishes in the hundreds of comments he receives on almost every post.