A Moroccan man was arrested in Barcelona for praising the beheading of a French school teacher outside Paris this month and inciting more attacks, police have announced. The man, who was not named, posted messages on social media in support of the October 16 murder of Samuel Paty, Catalan regional police said. Paty was killed outside his school in a Paris suburb by an 18-year-old Chechen who was apparently incensed by the teacher showing a cartoon of the Prophet Mohammad in class. Police shot the attacker dead. "Police officers from the Mossos d'Esquadra have arrested a man of Moroccan nationality,…