Who cares if we are dealing with the Lakers? We're Celtics fans! We should want what's best for the Celtics, and without a doubt the Lakers are the most logical destination for Rondo. If we can get their pick and Nash for him, I take that deal and don't look back.
Plus, do opponents of this trade really think we're helping the Lakers? The current Lakers squad with Rondo in the mix is maybe an 8 seed in the West. If they get a third star, they might have a chance at home court in the first round, but they still aren't getting past the likes of the Spurs and Thunder. I still think they'd be second best in their own city. If we help the Lakers build a team of Kobe, Rondo, and Star Player X (assuming it's one of the guys thought to be available now), we're basically giving a one way ticket to no man's land. In terms of sabotaging the Lakers, giving them Rondo might be preferable to letting them draft a young stud and start the rebuild they desperately need.