Bird had three goals, which he has been talking about for quite awhile:
1. Solidify the point guard position;
2. Bring in shooters;
3. Get rid of malcontents.
The two trades accomplished all three goals, especially after you factor in that the team is buying out Tinsley. I didn't like the trade with Portland much, either, but Bird fell in love with Rush's shooting ability, and bringing in Jack -- a starter -- as his backup PG really strengthens the team in that area.