Not that anyone was asking, but from this angle -
https://streamable.com/bhoi
it looks like Waiters lost his balance, was falling forward, and pushed off Ginobili to avoid having to move his feet.
That makes some sense. Hard to tell but he was leaning a bit, unless he was leaning with the intention of pushing Ginobili. That seems weird though; at no point in your training as a player would you be inclined to make contact with anyone while throwing the ball in.
As for the discussion about Ginobili, I've played and watched a ton of basketball and that is always a situation where the ref can just reset the inbound clock and tell the player to move back, similar to free kicks in soccer or batting area violations in baseball. There's no punishment for it perhaps maybe a delay of game if repeated.
This is one of the great things about sports.
Ken Mauer said:It's a play that we have never seen before, ever, but we feel we should have had an offensive foul on Waiters."
Thousands of NBA games have been played and this is a play that the NBA Crew Chief has NEVER seen. We think we have sports properly analyzed and then humans go and ruin the whole thing - the refs, Waiters, Green and Ginobili's lackluster passes.