I think it is time for Yankee fans who put their allegiance to the Yankees above that toward any other sports franchise to reconsider rooting for the Knicks rather than the Nets. Success for the NETS will benefit the YES network which benefits the Yankees. Success for the NETS benefits the corporation that owns both teams and helps the Yanks sign ball players. Success for the Knicks benefits Charles Dolan, who seems to view his interests to be in conflict with those of the Yankees.
I am a Yankee fan first, second, and third. I love basketball, but I have no particular allegiance to any team, so it is easy for me to say go with the NETS now. But I think every Yankee fan who puts them first, second, and third, as I do, should reevaluate which basketball team they support.
P.S. I suppose the same is true for hockey and the Devils, though I don't follow the sport closely myself.