AP is now saying :

“NEW YORK (AP) – The NBA suspended four players indefinitely Saturday for their roles in one of the worst-ever brawls in the league, a fight with fans that commissioner David Stern called “shocking, repulsive and inexcusable.” Indiana’s Ron Artest, Jermaine O’Neal and Stephen Jackson and Detroit’s Ben Wallace were suspended, the NBA said Saturday.

In other words, this is just a normal event for the NBA.
See my comments of the other day regarding rappers.

Same culture drives things in both places, these days… and the NBA isn’t going to solve this problem without recognizing that simple fact.