The undivided and authentic Church did not compare popes to Moses, and did not teach that gainsaying of Core is comparable to not being in communion with or obedience to the pope.
You cannot state that categorically.
See Letter to the Corinthians (Clement), Chapters 43 and 51. A challenge to the primacy of Aaron is seen as "sedition against Moses", and papacy is seen as prefigured in Aaron.
So in point of fact, your argument is from silence.
How does that make you any more insightful than the braying asses of the Reformation? They forever pule anything not contained in Scripture is contrary to Scripture. You are engaging in the exact same vanity, except with the Patristic writings.
Actually, upon reflection I suppose that would make you even LESS noble, as at least there is no disagreement over the inspiration of Scripture.
So I ask again, what IS Jude referring to with the gainsaying of Korah? Keep in mind, by your own standard, any explaination you give that is not authenticated by the Patristic writings is no more or less conjecture than the one you disdain from me. ...And that is hypocrisy, by definition.