 In July 2011 at the San Diego Comic-Con International while promoting his upcoming graphic novel "Holy Terror" in which the protagonist hero fights Al-Qaeda terrorists, Miller made a remark about Islamic terrorism and Islam saying, "I was raised Catholic and I could tell you a lot about the Spanish Inquisition but the mysteries of the Catholic Church elude me.And I could tell you a lot about Al-Qaeda, but the mysteries of Islam elude me too.