michael jordan did stuff much worse than that every single game and didn't get called for a foul, never mind getting ejected.
and i don't even know that that play by smart was intentional, he was caught up by the screen and was slightly out of control as he rounded the corner, i've seen collisions like that happen a million times.
the thing that gives me pause, though, is that smart had been mauled a couple times just a minute or two before, this happened after the spurs had gotten away with maybe a dozen fouls in the span of a quarter and yet had zero team fouls. smart could well have been angry at the no-calls.
so the refs played a part in this, if it was intentional.
so smart needs to learn not only to control his emotions, but to remember that NBA refs are terrible, and that texas teams get ALL the calls at home.