That is sad. Education never ends. It must be continued until death. There is always something new to learn. Secondly, it tells me that they are very, very prejudiced, and very, very bigoted, as every person is, except that they clearly do not KNOW this fact.
All people have assumptions, judgments, and prejudices about the world.
We are built to do this, in fact. There is so very much information, that the only way we can cope with it is to create simplified, general ideas about most things. There is not enough life span to test ever 'truth' we hear. One very big, too often unquestioned set of generalizations are the 'Good' and 'Bad' judgments derived from patriarchy. Patriarchy teaches that Male skills are 'Greater' and that female skills are 'Lesser'.