For a long time I considered the Dolphins and Bills our biggest rivals, with the Jets a distant third. However from the first New Yorker I met to almost every one that I get to know now, there tends to almost always be this arrogant, conceited "everything New York is better than anything anywhere else" - in this case Boston and New England. That attitude just by itself is enough to hate any new York team and their fans.
As for the Jets, I think a big turning point was them negotiating with Parcells when he should have been preparing for the Super Bowl - followed by their signing Curtis Martin. Obviously there's been a whole lot more back and forth since.
For me personally it started a long time ago; I think it was 1966. The Patriots had a very good team back then, led by an MVP season by Jim Nance. Nance not only led the AFL in rushing; he ran for nearly double the number of yards of the next leading rusher.
The Pats had won about five in a row and headed into the final weekend of the season with a slim lead over Buffalo. The last game was against the Jets, who were headed for about the third or fourth straight five-win season. A win would put the Pats in the AFL title game against the Chiefs, who they had tied in Kansas City about a month earlier.
What made this more exciting was not just the possibility of the Pats winning their first AFL championship. Back then there were two camps of fans: AFL fans and NFL fans. And the winner of that AFL title game would get to represent the AFL in the first-ever championship game between the two leagues - something that would later come to be known as the Super Bowl.
Well, the rest is history. The Pats turned the ball over four or five times. Two Jets running backks, Matt Snell and Emerson Boozer, both ran for over 100 yards each. The Jets rookie quarterback, a guy by the name of Namath, would go down in history two years later for doing what I wanted the Pats to do - be the first AFL team to beat an NFL champion.
To make matters worse, while the Jets went on to glory, the Pats went into a tailspin of sub-mediocrity for the next ten years. The following year the Red Sox had their 'Impossible Dream' year, the Celtics kept winning, and soon after Bobby Orr and the Big Bad Bruins were the toughest ticket to find in town. The Pats were a distant also-ran in both the national and Boston sports scene from that day forward for years and years.
Even without bringing up Tubby Rex and his crew of current jesters, are those enough reasons to hate the Jets?