Unfortunately that describes a lot of people, who are not crazy, simply naive and unprincipled and with no concept of what the Hell they're talking about. To defend the Confederacy on libertarian principles when the real thing used indiscriminate massacre and military dictatorships as a tool of state policy and invented first a lot of the great libertarian bugaboos implies either willful ignorance or simply demagoguery exploiting ignorance. Either are deplorable but they're also some of the oldest political tricks in the book from when people developed politics more sophisticated than clubbing someone else over the head.