But I think that the Mormons make a reasonable point when they say "Our church doctrines were arrived at via councils composed of men, and as a matter of fact, so were yours."
One could be a Nestorian, or a Socinian, or an Arian, and have an equal right to claim the title of "Christian". It's just that those beliefs failed to win the approval of the Roman and Catholic power structures and therefore have gone down in history as "heresies".
Well, an atheists defending mormonISM that may be a first. (I can not think of anything to say here that would not be sarcastic, so I wont.)
Nestorian, Socinian, Arian, Trinitarian, Modalist. Differences of view over the unity of God, and the deity and nature of Christ. This should come as no surprise that there would be a struggle over these crucial matters, any more than the many other differences of view in other Christian disciplines, such as in eschatology: Preterist, Historicist, Futurist, Dispensationalism, Premillennialism, Amillennialism, Postmillennialism.
Same with differences of leadership and authority. Protestants sharply disagree with the RCC over the primacy of the Popes, and Mormon “Apostles,” etc.
Most of us Biblicists could care less about Constantine, the councils of men, the Pope, Mormon Apostles, or anything else that sets itself up as the last word on Christian truth. It is for the individual Christian to seek out and find for himself.
Its an in house thing among us Christians, none of which has anything to do with you as an Ingersoll quoting Atheist.
When/where do mormons say that?
How cool is THAT!?