This is an example of what prejudice, racism and ignorance can bring in a society. The United States of America claimed to be the country of the free, protecting freedom everywhere around the world.
Ironically, within its own borders, its citizens had to fight on a daily basis for the same thing. As Martin Luther King stated, other countries in Asia and Africa were making much more progress in terms of independance and freedom from oppression.
It's funny how white people set discriminatory laws for black peope and then argued that they must follow them without complaining. If they want African Americans to obey the laws, they must let them participate in politics and in making the laws just like white people do.
Nevertheless, Martin Luther King knew one crucial rule: that violence is self-defeating and non-violent action is the key to recognition of civil rights. By preaching freedom, love, equality, he rallied millions of citizens at Washington, where he made his amazing speech "I Have a Dream".
I think it's important that we draw a lesson from this and in real life, instead of being arrogant and having an "in your face" attitude, we should choose for ourselves to agree or disagree with the situation at hand; and if we disagree, we should either withdraw or take a peaceful, non-violent approach to deal with it.