It's not about authority, it's about expertise. Anybody here can "speak for the Christian masses" if they know enough about their doctrines to do so and the community is expected to agree or object. What I'm doing is the latter: saying your assertions do not represent mainstream Christianity nor are they scholarly. Whether the point you are trying to posit is right or wrong is irrelevant.
Using a book written 600 years later belonging to a different and opposed religion as context for understanding doctrinal issue is not good form. I think the other 2 downvoters bear me out on this. —
Caleb Dec 7 at 14:36