Derek Jeter is good at baseball
He's rich
He dates various rich, beautiful women, many who make more money than he does
He has beaten the Red Sox plenty of times throughout his career.
So why aren't you slavishly defending Jeter whenever someone slanders him on TalkSox?
Because he plays on a team you don't like.
Hating Tom Brady gives the rest of us a perspective you lack. We can agree that he is a great quarterback without insisting that he's better than Joe Montana, Johnny Unitas, Brett Favre, and Peyton Manning all put together.
As for the hatred, I hate Tom Brady for the same reason I hate Derek Jeter, Peyton Manning, Dane Cook, Johnny Depp, Ronald Reagan, and George Lucas. Not because they aren't talented (except for Cook), because in their respective fields, they were/are all extremely talented. I hate them because of the way their most fanatical devotees act. They act like nothing these guys have done has ever been less than 100% perfect. Derek Jeter has been a mediocre defensive player for the better part of the last 6 or 7 years. Tom Brady has the advantage of a combination of excellent supporting players and a period in time where getting anywhere near the quarterback without patting him on the back and handing him a sternly worded letter requesting that he lie down on the ground as if he had been tackled gets you fined eleventy billion dollars. Ditto Peyton, but with less supporting players. Johnny Depp has played basically the same character in ten movies and has a near-diefication status among girls between the ages of their first period and their first divorce. Ronald Reagan is the conservative equivalent of Kennedy, the go-to guy for let's-do-what-he-would-do for the GOP. George Lucas can fart out Jar-Jar Binks and that infuriatingly obnoxious cardboard cutout Hayden Christensen and make 80 billion dollars from it. They are all indisputably talented, but attempting to point out a single flaw in any of their personalities or performances results in not a reasoned rebuttal, but an accusation that we are jealous of their success. THAT is why we hate Tom Brady. Frank Catalanatto was a two-bit player for the Jays and Rangers a few years ago, but every time he played the Sox he turned into Ted friggin Williams. I don't hate him because Frank Catalanatto doesn't have the army of drunken idiots and people who know little-to-nothing beyond "The Patriots/Yankees win more than other teams" constantly ready to eviscerate you for daring to suggest that there might be someone better.
PS: I have dated some extremely attractive women in my time. Including very recently. I may not be able to hook up with whoever Jeter gets, but I can do okay. I don't need to hate Jeter or Brady for who they date. I have plenty of other, more legitimate reasons to despise them.