I never actually claimed you meant the IRA aren't terrorists. And I understand that they aren't trying to further the cause of the Catholic Church, but the fact is they use do you religion to further their own cause. They've used Churches (with the priests' consent) to hide their arsenals and stage bombings - Claudy is just one example. The Protestants do the same thing.
The paramilitaries and regular thugs on the street target people because of their religion. That's why you see signs all around Belfast, in the paramilitary strongholds, "Taigs/Huns enter at your own risk." Taig/Hun being deragatory for Catholic/Protestant. The Shankill Butchers (Protestant terrorists) in the 70s drove the streets of Belfast looking for Catholics to torture and kill. The IRA today threatens Catholics who join the police service. They don't threaten nationalists, they specifically use the term Catholics.
Just because priests aren't publically supporting the IRA in the newspapers doesn't mean they weren't doing it behind the walls of their churches. Several prominent authors have written about the role Catholicism plays in the IRA. From the IRA induction ceremonies that are based on Catholic traditions, to the Christian Brothers openenly teaching the virtures of IRA republicans to its students for decades. There's a reason most of the founders of the current IRA organization - the Provos - were all Christian Brothers students.
Interestingly, the Provos have a new punishment shooting style, because Royal Victoria hospital has gotten so good at rebuilding knees. They make their victims kneel and clasp their hands together like they are praying. Then the victims are shot point blank through both hands. They call it - wait for it...the Padre Pio.
So, I applaud the Bishop who finally called on the IRA to disarm. It was long overdue. The Catholic Church in Ireland remained silent for too many years. But to say there are no such thing as Catholic terrorists is absurd. And to say there is no such thing as Protestant terrorists is equally absurd.