He is what is called in the Catholic world, a Cafeteria Catholic.
He picks and chooses what he accepts as fundamental Truths.
He only got upset when MS appears (actually is) to deny the ritual of the burial required in the Catholic Church.
The murder of the girl is of no consequence to him because MS was her 'lega' husband. This is despite the fact he clearly violated his duties as a husband according to the Catholic Church's teachings.
Hence, Cafeteria Catholic.
Pray for W and Our Troops