The only heckling/interfering I recall is the guy trying to get the fans behind the bullpens pumped up. I don't remember ANYTHING about him heckling the players directly. Whatever he was doing, regardless of its nature, did not warrant the response that it got. Besides, I remember Nelson just being a bit of a douche bag in general - he was a bit of a loose cannon, so I wouldn't be surprised if he went nuts for an irrational reason.
So you're saying that Garcia couldn't judge by the other bullpen pitchers that restrained themselves from getting involved in the fight? Let's remember, he had to run from RF and jump the barrier before proceeding to beat the s*** out of the guy. If he was simply "defending his teammate", wouldn't he be wondering why he was the only other person jumping into that fight? If Nelson needed defending, I have a feeling the entire Yankee bullpen would've been there quicker than Garcia to help out. Look, 26, it seems like you try to find a way out of any accusation against any Yankee player. I know you don't condone it obviously, but to say that their behaviors were somewhat warranted against a completely defenseless park employee who was just trying to support the home team is nothing short of ludicrous.
Manny threw McCormick to the ground, apologized for his behavior, and his apology was accepted. What more do you want? You have to at least be happy with the apology... and since it was accepted, I have no trouble dropping any lingering problems from this incident. I don't agree with the Sox in that they're dealing with it internally because it seems like they're protecting him from the public to an extent, but I trust that they're taking the necessary actions to ensure it doesn't happen again. If he's fined, that's fine, but the punishment should be publicized so everyone knows that the Red Sox aren't sleeping on this.
All that said, I'm still convinced that you were trying to make a "Yankees have more class" argument. While I buy that you're talking about players and how their behaviors are handled, I believe you took it to the next level when you stated, "We're not the Red Sox we don't tolerate that s***." Sounds to me like you're trying to say that the Yankees handle their players' unacceptable behavior better than the Red Sox do.