He wasn't brought down by a case that proved his practices were discriminatory. As far as I know no one has claimed that he was discriminatory in whatever hiring capacity he had with the Clippers (which for the record is probably not major). No one would know or care if the news media had something worthwhile to talk about instead of celebrity gossip. They can replay a sound bite over and over and turn a whole city against someone, someone who didn't do anything wrong other than possessing an opinion that's considered uncouth or presented as troublesome, and more than just "public outrage", they can then get his property taken against his will. The fact that this is possible, regardless of the content of the sound bite, should be very scary to anyone interested in maintaining free dialogue.
Free dialogue necessarily requires people to feel capable of expressing very unpopular things without major ramifications. Adverse governmental action is one element of this, but not the only element. I understand that the proceedings against Sterling are held in accordance with NBA bylaws to which Mr. Sterling supposedly agreed and that they're not an external legal proceeding (though I don't doubt there would be such a proceeding if the NBA didn't have provision to strip Sterling of ownership), but as stated, public hostility toward the principles of free speech, which is becoming quite massive, is nearly as problematic, especially when our media is so conglomerated.
Our modern communication media are inherently dangerous due to the extreme barrier to entry. This is changing partially with the internet, but for the time being and foreseeable future, it's still no competition with cable and establishment outlets. This is a major social and cultural threat and the FCC should do something about it.