We should all guard against over/zealousness against sinners and “pious revenge” against heretics. These are not catholic ideals. And can lead to bitterness, anger and loss of faith. Very dangerous.
You're right. There'a balance to be had between the two false extremes. On the one hand, it's wrong to gloss over, minimize, and effectively condone the gravity of all that Bergoglio did to harm and destroy the faith ... and on the other extreme the bitter zeal wherein one can sense almost a sick pleasure in the thought of Bergoglio burning in Hell. If I had to pick which one is worse, however, it would actually be the latter IMO. But all this talk of "well, he's died now, so we should only say good things about him" ... that's also a grave error because it condones and minimizes his crimes as if they had been "no big deal".
Let's say someone who died who had been a serial adulterer and/or fornicator ... perhaps having abandoned a half dozen "wives" and dozens of children. "Well, he was a super nice guy, very kind, generous to the poor." Highly inappropriate, since it gives the impression that these qualities offset his very real sins. At best one might not bring them up and just tell his relatives, "I'm sorry for your loss." ... but it's very wrong to start praising such a guy. And the same thing holds of Bergoglio.
I wonder why so few people can find the right balance between erroneous extremes.
Bergoglio did some terrible things that we must not minimize, but at the same time we don't wish damnation on anyone, and God wills the salvation of all souls. I do think it likely that he did not save his soul (though I do pray that in the past he received the grace and light of conversion and repentance), but I still feel sorry for the poor fool.