If there is any similarity between the new DNA evidence and how Heyerdahl arrived at his conclusions it must be purely coincidental.
1. He wasn't the first to propose the connection...see link below:
2. [www.archaeologybulletin.org]
"Heyerdahl’s valuing of these race nations established a hierarchical order. So-called aspects of high civilization (written language, navigation, societal organization, monument building, etc.) were associated with the white bearded men, while violent, superstitious and primitive behavior was associated with the Maori-Polynesians and the Melanesians (e.g. Heyerdahl 1952: 187). This value hierarchy between superior (white) and inferior (brown and black) people has led recent studies to accurately emphasize racism as a key factor in Heyerdahl’s work (Andersson 2010; Engevold 2013; Holton 2004; Magelssen 2016; for further discussion on racism in colonial anthropology/archaeology frameworks see Ballantyne 2002; Ballard & Douglas (eds.) 2008; Ljungström 2004: 21–30; McNiven & Russell 2005)."
3. I wonder if the BLM knows about Heyerdahl?