I think you have it all wrong. The end result of Rosa Parks's courage -- and of the whole civil rights movement in general -- was not that from now on only black people could sit at the front of the bus, while the whites would be relegated to the back, but that  _anybody_  could sit anywhere they wanted to if a free seat was available. That's true "egalitarian society."  That's what MLK fought for, and that's what's morally right. Sending white people to the back of the bus -- or a concert venue -- is just as racist as it was to try to prevent Rosa Parks from sitting in the front, and white people have just as much right to REFUSE to move if ordered to do so as she did.