LOS ANGELES — Fuming for two months in a jail cell here, Nakoula Basseley Nakoula has had plenty of time to reconsider the wisdom of making “Innocence of Muslims,” his crude YouTube movie trailer depicting the Prophet Muhammad as a bloodthirsty, philandering thug. Does Mr. Nakoula now regret the footage? After all, it fueled deadly protests across the Islamic world and led the unlikely filmmaker to his own arrest for violating his supervised release on a fraud conviction. Not at all. In his first public comments since his incarceration soon after the video gained international attention in September, Mr. Nakoula...