Some people really do hate KB out there. I read some responses to the yahoo article about KB's injury and its like some people are glad hes hurt. As if Kobes injury makes their lives better somehow.
I personally don't risk injury on nobody. Especially someone I don't actually know and just see on TV doing what he/she does best. A person that I root for or against because its fun to love/hate someones game. But hate their game, not the player. I wouldn't even want to see Celtics get injured. When Rondo got hurt I felt bad for the guy. Screw a rivalry, its peoples livelihood and physical wellness that is important.
Rivalries are for the fun of the sport and our own entertainment. Its not meant to carry over into some ones cold bitterness they have in their life.