I am not sure fr. Pfeiffer get the graces from helping a widow when he provided help to her to divorce
And just because "nature" helped out Fr. Pfeiffer by taking out Mr. Blaszak, the fact remains that even if he had been healthier, he would be estranged from his wife thanks to Pablo/Fr. Pfeiffer's encouragement.
We can't just forget all that and say, "Well, she's a widow now anyhow, so it no longer matters."
Yes it does matter what Fr. Pfeiffer encouraged and/or allowed to happen! Until Fr. Pfeiffer apologizes (repents) for his role in her estrangement and divorce, we must hold that against him and his reputation.
If John shoots a man but his victim doesn't die from the gunshot would, and later in the hospital dies of a completely unrelated thing like cancer (which wasn't caused directly or indirectly by John's attempted murder), would John be off the hook?
Would the cops say, "Well, he died of cancer anyhow, so you lucked out this time. You're free to go, young man."
Is that how it works? I doubt it.