I would guess the amount of textbook Aryan nuclear families willing to be the faces of a race based political campaign are fairly slim, even if they believe in the cause.
Sometimes it's incompetence, or time constraints. Sometimes it's deliberate, as anything to get people talking and your message traveling farther. Sometimes the sheer volume of crap your side is putting out prevents any sort of budget for professionals. Sometimes it's Darwinian, push out a firehose worth of content and see what rises to the top.