"The 'Sweet Caroline' Dispute"

This has been a dispute in Boston & New York for awhile. It is in the 8th Inning at Fenway Park, when this unofficial anthem of all things Boston Red Sox.
Neil Diamond came from Brooklyn, NY, is a Yankees Fan & wrote The Song in a Memphis, TE, Hotel Room.
Methinks, John Henry got his idea for "Sweet Caroline" @ Shea Stadium.