Timothy McVeigh was a Roman Catholic and he killed 168 people in the Oklahoma City bombing. If you assume that he and 18 members of his congregation carried out attacks of equal lethality, that would total 3192 deaths. By the same mathematical calculation, each of the 19 terrorists on 9/11 was responsible for 157.7 casualties per terrorist. So by your logic, Roman Catholic terrorists kill more people per terrorist. Just doing math here to show the idiocy of your logic.