The father of Omar Mateen, identified by police as the man behind the carnage at an Orlando nightclub early Sunday morning, is an Afghan man who holds strong political views, including support for the Afghan Taliban. Seddique Mateen, who has been referred to as Mir Seddique in early news reports, hosted the “Durand Jirga Show” on a channel called Payam-e-Afghan, which broadcasts from California. In it, the elder Mateen speaks in the Dari language on a variety of political subjects. Dozens of videos are posted on a channel under Seddique Mateen's name on YouTube. A phone number and post office...