Family Proclamation Is Commentary?

In a Salt Lake Tribune opinion piece, author and scholar Taylor Petrey says that the Family Proclamation is just "commentary." That it is just describing the times in which it was written.

But both President Oaks and Elder Rasband stated strongly that the Proclamation to the World is "doctrine" and "revelatory." This is a perfect example of "Athens vs Jerusalem." So many now want to rid ourselves of the Proclamation or diminish its value into something like "commentary." Why? What is the push?

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