You can find instances of racism in every country and sadly I don't think that will ever change. But rather than highlighting one incident, you should look at the overall picture. And in my lifetime, I am amazed at how far the US has come in regards to equal rights...both in terms of race and gender issues and acceptance of lifestyle choices.
One thing that speaks volumes about the US as a whole, is the fact they elected Barack Obama. You can say that he is half black/half white...but honestly by looking at him he is perceived as an African American and on top of that his name is Barack Hussein Obama!! I am still shocked (and proud) that Americans looked beyond race (and name) and elected the best person for the job.
African Americans only make up only 12% of the population in the US and about 13% of the electorate (in the 2008, 2012 elections)
Anyway, I don't know too many other countries that would elect a President whose race and skin color are only reflected by 13% of the electorate.