Postulate (which after all if just Latin for demand) that the Catholics are wrong. All data to the contrary will then be seen to need either outright denial or further interpretation in order to be admissible.
Under tis method, the guy was not not saved, he just slipped into an especially pernicious delusion. His amendment of life, his charity, his faith, all these are bogus, tools of the Evil One to deceive, if it were possible, even the elect.
It is simply not conceivable that we Catholics are not wrong. All else follows.
And in particular, the perseverative repetition of tired arguments and mischaracterizations, which may appear to be useless, is in fact done not only for the lurkers, as some have openly said, but also in the hopes that the water torture approach to conversion will finally destroy the opposition and save his soul.
Nuthin' but LOVE for you, baby.
There is also a persistent, pernicious, pervasive misstatement of what we believe ... often to the point of reversing the meaning. And the misstatements are repeated in the face of repeated statements of what we actually do believe.
This goes beyond mere dishonest rhetoric. It is an outright slander of every Catholic, both individually and corporately.
Exodus 20:16
It's not just a good idea. It's THE LAW.