I think the opposite is implied.

Outspoken racists tend to be "republican". Really just some flavor of extreme conservative, but republican has become a catchall term for right wing.

More subtle, closeted racists, come from all over the political spectrum through.

Yeah thought that should be obvious. Not every republican is a white nationalist but these people made no secret about their vote, or their belief in great replacement theory, or their views that non whites aren’t fit to hold government office.