Was it because of his hair? If it his, THOSE ARE DREADLOCKS YOU LANDLUBBER! Old Scratch is Jamaican. Some Jamaican males where their hair in dreadlocks.
Actually, Old Scratch isn't necessarily Jamaican. Yeah, he says "I an' I", which is a part of the Jamaican Rastafari belief, but the titles he gets as he promotes are from Haitian Vodou (or Voodoo) traditions.
Then again, technically, the Caribbean doesn't exist in the Spiral -- so the whole point of where he's from is kinda moot.