His point is, isn't a Pope's magisterium greater than St Alphonsus' opinion? Yes. So, if one is a BOD'er, then to contradict the Pope would be heresy.
You say that purgatory is required of BOD. The pope says no. Ergo, in the BOD world, you are a heretic.
But I thought you and Ladislaus said that BoD ITSELF was heresy, no? If that is the case, then you and Ladislaus must be saying that Pope Innocent is "a heretic."
Please tell me how you are not saying that. Please just focus on BoD itself in the statement of Pope Innocent, which you and Ladislaus claim is a statement of such Magisterial authority that anyone disagreeing with ANYTHING in it would become, in your words, "a heretic."