Perhaps you could use the word "idiot" and refer to them as "idiots". The term has been used in a medico-legal context in the past to define a person's mental age.
That there is a divide between the two parties and the average intellectual ability of their supporters is a well-known fact. I'd contest that this is less of an issue than their racism.
That there is a divide between the two parties and the average intellectual ability of their supporters is a well-known fact. I'd contest that this is less of an issue than their racism.