I don’t think it is inherited, I think that it is a cultural thing. I think ignorance is like racism, sexism and homophobia, we are not born with this hatred, it is taught to us. I think society needs to change. Reward intelligence, do not belittle people who are intelligent. That is what needs to change.
Sadly, we have a culture of the Kardashians and Trump that get rewarded for targeting the lowest common denominator. In other words, they play dumb people for suckers, and people now glorify ignorance, so appealing to ignorance through ignorance is the way to go.