Translation of rusticidad

At around seven, it wasn't dark anymore, the mother of the family offered me some tea. I felt so uncomfortable coming to a new family owned casa and vomiting there all night, but I was really sick.
Once they see a foreign person, their primitive thoughts come up and they start to hate and dislike without any actual reason. Whose fault is this hate? Is the fault of the ones who are afraid.
We shared a cabin with an elderly couple from Spain. They started blablaing about Spain, about their corrupt government and about their civil war. They should not work in PR, advertisement or sales.