Source: Christianity Today Propaganda video released the same day Justin Welby arrives in Cairo to honor the previous 21 victims. by Jayson Casper in Cairo Once again, ISIS has orchestrated and filmed the dramatic mass killing of African Christians who refuse to deny their faith. This time, the approximately 28 men targeted by the Libya affiliate of the self-proclaimed Islamic State (also known as Daesh) were Ethiopian Christians. In February, the killing of 21 mostly Egyptian Christians drew widespread horror and fears of future massacres, but also led to Egypt’s largest Bible outreach. Describing the 30-minute propaganda video released Sunday,…