It's not about our opinion of him, which is irrelevant, because he's dead. It's about how he failed politically. Committing a religious sacrilege so offensive to people that they killed him for it is politically incompetent. Our moral judgement of that fact -- as readers of HN in the year 2022 -- is irrelevant to his political fortunes in the year 222.

Let's say that you're an English king in the year 1680. You're openly Catholic; and for that, you get deposed. From our moral opinion in the year 2022, that king did nothing wrong. From a political point of view though, he was terrible. And his terribleness was caused by him being an openly Catholic king in England in the year 1680. It was the worst thing he did politically because it ended his political career.