Here is the answer to your implied question—the followers are a mixture of closeted racists ( they will claim they are not but truth is they view minorities as less than them and not true Americans), largely men who have a chip ( a big boulder) on their shoulders because they feel they have been wronged somehow, and folks who are not curious ( which is why they take for granted what assertions are made on Fox. They see things as only important if the issue effects them. They are almost exclusively white, and they are not open to any ideas that represent a contrary view.