Do you get mad when people call you the wrong race/ethnicity?

This has never happened to me but my husband was at work today and one of his soldiers kept calling him the wrong name. After correcting him a few times my husband asked him why he kept mistaking him for another person. His response was, "all of you Mexicans look the same." My husband is Puerto Rican, not Mexican so he got mad about this. I think it was valid for him to get upset.