Mimi, even if people are blind, ignorant or downright hateful/hurtful, doesn't our Catholic faith teach us to have patience with the faults of others, to forgive and to make peace?
If we check our Bible, I don't think we'll find anywhere where it says, "Christ died for all men... except the following races:..." That is nowhere.
As Catholics, we all have to look beyond skin color, and forgive the faults and failings of one another, and "have a constant mutual charity among yourselves: for charity covereth a multitude of sins."
We all want to be forgiven for our sins, even if we really, really mess up or offend people. So we should also learn to have patience with those who offend us, just as we want to be forgiven our offenses.
Wouldn't it be better to simply pray for those who upset you, and ask God to help them be better than they are? Since He is the Father of all of us, He will help things better than any ongoing argument could.