They are thou. 100%. They are just inserted in a better way, giving the entire family that ethnicity and a location they originate from that aren't westeros explaines it.
In the books that family is white as snow thou... so its 100% balckwashing, just better done backwashing than what rings of power.
The rings of power shouldve just made all those hobbits black and mentioned they migrated from the south for X reason. problem solved.
edit: Lol this was infracted?! what kind of mods do we have here?