M2C intellectuals claim the reference is ambiguous. Joseph could have been referring to a hill in southern Mexico!
These same intellectuals know that, just the year before, Letter VII was republished in the same newspaper, but they never tell people about that. (Letter VII unambiguously declares that the Cumorah of Mormon 6:6 is the same hill where Joseph found the plates).
They know that Letter VII was again republished in the Church newspaper in New York City called The Prophet, this time in June 1844 (it appeared two days after the martyrdom).
Letter VII was also published in early 1844 in a special pamphlet in England.
This means that both before and after D&C 128 was published, Letter VII was republished in Church newspapers for everyone to see.
It's understandable why the M2C intellectuals would mislead their students and readers, but why do those students and readers believe what they're told?
The answer is simple: members of the Church are never taught about Letter VII or the New York Cumorah.
It's a good discussion about part of D&C 128, the part that covers baptism for the dead.
But the chapter never mentions Cumorah or Joseph Smith's enthusiastic overview of the Restoration. People reading Revelations in Context will never now why Joseph referred to Cumorah in D&C 128.
BTW, Revelations in Context also mentions D&C 125, here:
Here is the entire "context" of D&C 125:
Doctrine and Covenants 125, a brief revelation received in March 1841, concerns the establishing of the Zarahemla stake across the Mississippi River, in Iowa Territory.
If you actually read D&C 125, it says nothing about the stake in Zarahemla. Instead, it says this:
Let them build up a city unto my name upon the land opposite the city of Nauvoo, and let the name of Zarahemla be named upon it.
In my view, the Lord named this area Zarahemla because that's where ancient Zarahemla was, but you'll never see a discussion about that because it contradicts M2C.
Last year, students studied the Book of Mormon. The manuals don't mention the term Cumorah, even when they cover Mormon 6. Look at how the Introduction avoids using the term:
His abridgement was recorded on the plates of Mormon, also known as the gold plates. Following Mormon’s death, his son Moroni finished the record and the plates were hidden until they were given to the Prophet Joseph Smith.
This year students are covering Church history and the Doctrine and Covenants. The manual doesn't mention Cumorah. Even the lesson that covers D&C 128:20 doesn't mention, let alone explain, Cumorah.
It's easy to see how current BYU and CES students are so easily persuaded to accept M2C.
They are never taught what the prophets and apostles have taught about the New York Cumorah.