They had to, going down 3-1 is a death sentence, it was basically do or die.
Spurs are still going to take them in the long haul.
The Suns will be losing Amare next year also, to avoid the luxury tax + rumor is D'Antoni doesnt really like him. So this is like a final hoo ra as well. Nash's back is hurting more and more, but he really wants a championship.
I have a feeling Detroit is going to take it all this year.