We here at BookofMormonCentralAmerica know Cumorah is not in New York.
Letter VII (7) is the product of pure speculation by Joseph Smith and Oliver Cowdery. They were wrong, and they misled the Saints as a result. They misled many leaders of the Church. We would prefer that no member of the Church read letter VII, but if you do, realize that LDS scholars agree Cumorah cannot be in New York. It can be lots of other places, but just not in New York!
To clarify our position, we put together this table of authorities to help explain whom you should trust.
People who perpetuate a false tradition about Cumorah being in New York
People who teach the truth about Cumorah not being in New York
LDS scholars who promote a Mesoamerican setting for the Book of Mormon
LDS scholars who promote a Baja Californian setting for the Book of Mormon
LDS scholars who promote a Panamanian setting for the Book of Mormon
Lucy Mack Smith
LDS scholars who promote a Peruvian setting for the Book of Mormon
LDS scholars who promote a Chilean setting for the Book of Mormon
Heber C. Kimball
Parley P. Pratt
Joseph F. Smith
Heber J. Grant
George Albert Smith
Joseph Fielding Smith
Marion G. Romney
Mark E. Peterson
True, there are some disagreements among LDS scholars in the right column, but they all agree on one thing: The Hill Cumorah cannot be in New York!
The best way for you to steer clear of the people in the left column is to stick with Book of Mormon Central. They run a wonderful website that frequently reinforces the non-New York Cumorah. Here's the link: https://bookofmormoncentral.org/
Be sure to read the Interpreter, Meridian Magazine, BMAF.org, FairMormon, the Maxwell Institute, BYU Studies, and other web pages affiliated with Book of Mormon Central. Don't read anything that contradicts or challenges the consensus of LDS scholars and educators who have been properly trained in the Mesoamerican ministry.