Is it racist to call someone by their name and not their ethnicity?

Recently, my friend and I were called racist because we think it's disrespectful to refer to a person you know and everyone else knows by their race or any other traits. My friend gave an example using me. I'm Mexican, so my friend said it would be disrespectful to say, "Hey, Mexican boy, bring me some coffee, please", vs saying, "Wally, bring some coffee, please". We never even mentioned anything about it being racist but he said that we were racist for thinking that. He also said, "only right wing extremists think it's racist to not call people by their ethnicity". Do you think he's right? Do you think he might be insane or just a typical race baiting liberal?

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Thank you all for your opinions. Wow! Clearly you all think he has some type of mental illness and also has a very low IQ. I don't like to pick on the UNFORTUNATE but sometimes they need to be put in their place. Racist is not a word that should be thrown around as a way to end an argument when your losing. I actually feel sorry for him and will try to support him in any way I can. Again, thank you all!
Is it racist to call someone by their name and not their ethnicity?
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