>> As Harnack and many other historians have noted, popes Zephyrinus and Callixtus I, who were Monarchian Modalist heretics were the first Roman bishops to apply Matthew 16:18 <<
The sources you people will quote sometimes to back your argument are amazing. You seem to be referring to Adolf von Harnack, a German who promoted the “social gospel,” the Protestant equivalent of liberation theology, and who asserted, among other claims, that the Gospel of John was spurious and denied the existence of miracles. He’s about as credible as the Queer Theory “historians” who claim that Jesus and John were homosexual lovers.
Well, as previously, and often, noted, a source that is anti Catholic is well received; that same source when used to justify Catholic teachings is spurned as anti- or extra-Biblical.
Methinks that the loudest louts are attempting to cover up their deepseated insecurity. It is also easier to attack a sound structure than to defend a nebulous wisp.
If you noticed, I said Harnack was one of many. You can also include Phillip Schaff, whom Roman Catholics are fond of citing when they think Schaff supports RC positions.
Are you denying that Roman popes have not been found to be heretics?