Don't worry about what your friend says. He's obviously a fan of an inferior team and needs to grasp at straws in criticizing the team. He talks about how Rondo is only doing this good because he's playing with 3 future HOFers, but he's probably the same person that says the Celtics can't win it this year because the Big Three are past their prime.
To be honest, I don't think Rondo will make the all-star team. It is a stat-driven game, and that's what the coaches look at. Doc knows how valuable Rondo is to the team, and I'm sure every time an opposing coach plays the Celtics, they realize how valuable he is. But they only see him a couple times before the all-star break, at most.
And when you have Devin Harris and Jameer Nelson putting up better numbers, and both teams doing better than expected, it's easier to go with them as all-star picks. It also doesn't help when you've already got 2 or 3 teammates making the team.
I'll take Rondo over Nelson and Harris any day of the week, and he'd definitely be more fun to watch than Harris, and Nelson especially, but as I said before, coaches are gonna look at stats, and in particular points. And the other two have him beat in that category.