For years, I took care of a very rude child. When he was 3, I called him rambunctious -- and I talked to his mother about "setting limits." At 4, I called him "demanding." At 5, he was still screaming at his mother if she didn't do what he wanted, he still swatted me whenever I tried to examine him, and his mother asked me worriedly if I thought he was ready for kindergarten.
I could go on (he didn't have an easy time in school), but it would sound like a Victorian tale: The Rude Boy. I never used the word "rude" or even "manners" when I spoke to his mother. I don't describe my patients as rude or polite in the medical record. But I do pass judgment, and so does every pediatrician I know.
It's always popular -- and easy -- to bewail the deterioration of manners; there is an often quoted (and often disputed) story about Socrates' complaining that the young Athenians have "bad manners, contempt for authority." Sure, certain social rubrics have broken down or blurred, and sure, electronic communication seems to have given adults as well as children new ways to be rude. But the age-old parental job remains.
And that job is to start with a being who has no thought for the feelings of others, no code of behavior beyond its own needs and comforts -- and, guided by love and duty, to do your best to transform that being into what your grandmother (or Socrates) might call a mensch. To use a term that has fallen out of favor, your assignment is to "civilize" the object of your affections.