New York/New England always a rivalry??

So this past Super Bowl we experienced the New York Giants play the New England Patriots for all the marbles. It became a rivalry between the fans even though the Patriots main rivalry is the New York Jets. We also experience every year the rivalry of the Boston Red Sox and the New York Yankees. In the distant past the New York Rangers were heavy rivals with the Boston Bruins.
There is one New England/New York rivalry that gets passed over every year. This rivalry is between the New England Revolution and the New York Red Bulls. When these two teams play it is always an exciting match up. The question is, is it really a rivalry made by the players or a rivalry made by the citizens of the cities?
Boston and New York are two major cities in our country, but why is there so much rivalry between the teams from the cities? Well, it might be because a New York team and a New England team have been a part of their respective league since the league was formed. In hockey, the Rangers and Bruins were part of the “Original Six” in the National Hockey League. In baseball, it was the selling of Babe Ruth that made the two teams a rivalry. In football, the Patriots and Jets became strong rivals when Parcells and some players went from the Patriots to the Jets. So is the New York/Boston rivalry in Major League Soccer just following what the other leagues have formed?