I know a lot of you are shaking your heads out there but let me explain.
Nash definitely is NOT the best point guard in the NBA. I actually think either Deron Williams or Chris Paul is. But Steve Nash blends in better with a team of All-Stars due to his passing ability.
Nash is the NBA's no.1 man in assists. He helps other players and make them seem better. If you have a team of All-Stars then you want all of them to get the ball which is why Nash is a good selection for this. He is not only an All-Star but he is a great distributer.
So he can pass but what else can he do? Well as we all know he has a fantastic shot. He can score with ease. If he has to because nobody else is open, he can put the ball into the bucket. He can score from anywhere on the court and has a great three point shot.