(paraphrased from Michael Malice)
Sadly, no they didn't.
It took until the pictures of uninvolved white women bleeding from rubber bullets for a whole lot of people to say "Holy shit. That could happen to ME!"
In addition, you had videos of cops with their badge numbers covered and press getting arrested.
These protests threw the fact that the police do this all the time and expect to get away with it into the faces of people who don't normally see it.
It also showed that certain police departments can handle this and really do function better thus undermining the arguments of police departments who refuse to change.