Outside of Kobe, I would have been fine rooting for any of those guys (although Isaiah would have been tough). I'm not going to pretend I wouldn't root for a guy just because he played for a team that was a rival of the Celtics.
Same, though I'd probably say rooting for Isaiah would be a little more than tough.
A lot of those rivals would be mind-boggling to root for, but I hate LeBron as much as anybody and I would sure as heck root for him on the Celts.
If any of those guys were Celtics for life (aside from Kobe), I couldn't help but brag about them. Though, I gotta say if LeBron came here at this point in his career, I don't see a lot to brag about.
I don't actually want him to come here, but I'm not going to pretend like I wouldn't enjoy it if it happened.
I don't rule out the possibility of netting LeBron, but I'd give it a 98% chance of not happening. The only reason is because it would be a smart move for him, but I think the rivalry early in his leaves him resenting the Celtics and those awesome 07-12 teams.