I was at the game, and I cheered for all the Red Sox players because I was rooting for the American League. Also, I thought it was stupid to boo players during an all star game.
With that being said, a700hitter, I really just think you're looking for more reasons to hate the Yankees and their fans. Yeah, they booed, but the way you're talking it's like the Red Sox players were physically attacked by Yankee fans. You're being way too sensitive about this.