For everything Nash has done for the franchise, he did two exceptionally nice things for him:

1. Traded him somewhere that ensures he would remain close to his children, and wouldn't have to uproot them.

2. Traded him to a team that would allow Steve another run at the title picture.

For a guy that's been there for the peak of his career, that's actually a very generous thing to do. The fact that the Lakers are division rivals only hammers home the kindness of this token of generosity and respect he has toward Steve. This was a big fat "Thank You, Steve" gesture, and calling him a piece of shit for it is pretty shitty of you.