If the hospital made the decision to save the life of the mother at the expense of the children, or could be proven to have treated the fetuses with gross negligence, then they certainly could be called to the carpet for ignoring their own dogma.
That's not what's happening here. The question before us appears to be one of liability, not ethics or morality. Unfortunately, in our sue happy culture, even Catholic businesses have to cover their asses. If they admit liability for the fetuses, the monetary judgement would skyrocket. This hospital, rightfully, should pay a heavy price for dropping the ball and allowing a mother and her two unborn babies to die. But anti-Catholic hatred shouldn't make it a blank check.
The morality of abortion is not a religious belief, any more than the morality of slavery, apartheid, rape, larceny, murder or arson is a religious belief. These are norms of the natural law of mankind and can be legislated even in a completely religionless society.