I think she lacks the ability to see the world from outside of her own viewpoint, even if those views are shown/explained to her. Many people can't do it, it is not meant as an insult.

Sadly, people like that cannot accept contrarian data into their world view, they lack the tools to dissect it, analyze it and use it to challenge their own views. They cannot accept challenges to their world view either, they are right simply because they feel they are right and that is all that is needed. All other data points must be rejected and destroyed.