There is more nuance then this.

There are two types of people who support the confederacy:

1) rich people whose ancestors made money off plantations, who want to maintain that social order. The “Donald Trumps” of the world, essentially.

2) poor people in Appalachia/Deep South who have no job opportunities and have been brainwashed to believe that the industrialized North/major cities are leaving behind coal minors and small farmers. These are the people who fear that automatization and outsourcing and a rising immigrant population are taking their jobs away.

The latter is the one you refer to. The former, however, is the one who brainwashes the latter through Faux News.