If you dump Amare and keep Diaw, that is building through Diaw. No?
Oh, I see what you mean. I am sorry, I did not mean to imply that. Diaw is by no means someone you can build around, at this point in his career anyway.
You can get some serious talent in return if you trade Amare.
Nobody is going to take Diaw at this point. If he proves he can play like he did last two games and he can average 21, 9 and 8, while shooting close to 60%, you'll probably not want to trade him. If you did, you could get some talent in return, but still not as much as you could for Amare.
I know it's a pipe dream, but let's say somehow we manage to get Chris Paul or Dwight Howard in a multi player deal. You're building around Chris Paul or Dwight Howard with Boris being a very important role player, you're not building around Diaw.
Sorry for misunderstanding. In no way shape or form am I saying that Diaw is a player we should build around, nor that Diaw is better than Stoudemire.