Are all the people equal?

Maybe I am repeating myself, but this is a topic that is very important for me. The topic is the racism and the bullying. When I am going to class every day, in the hall I see some kids punching and yelling someone that seems weaker than them, and I think that these people are stupid. But not only in the highschool it happens.

Sometimes, when I go out with some of my friends, we go to the supermarket, we see a shop assistant pretending that some people doesn't exist even if they shout. The reason can be that these people are from another country, because if it's not, I don't think what's in the mind of that shop assistant.

I think that is not fair for the affected people. They have the same right to go shopping like the others, it's writed on the Declaration of the Human Rights.