Almost nobody behind “Uncut Gems,” the …

Almost nobody behind “Uncut Gems,” the Adam Sandler/Kevin Garnett drama steeped in NBA lore that opens Friday in New York and Los Angeles (and nationwide on Christmas), wanted the movie to have anything to do with Garnett and the Boston Celtics — unless it somehow involved the Celtics’ humiliation. Josh and Benny Safdie, the writer-director brothers, are diehard fans of the New York Knicks — which naturally means they hate the Celtics. “I hated Boston,” Josh Safdie told ESPN this week. “I hated KG.”