They are wrong there were no Viking settlers in North America. Instead there were mainly Norwegian settlers in North American, with a few ethnically from other Scandinavian lands.Vikings
This is from the Smithsonian Institution website:
"But in 1960, undeniable proof of Vikings in North America came to light at L’Anse aux Meadows in Newfoundland, Canada. Several Norse Viking pieces and clear Icelandic- style house foundations gave proof positive that Vikings had indeed landed, and briefly settled, in North America 500 years before Columbus."
Archaeologists Spy New Viking Settlement From Space | Smart News | Smithsonian
This one is from Smithsonian Magazine:
"More than a thousand years ago, a group of Vikings became the first European explorers to settle North America. It wasn't until the 1960's when archaeologists discovered the remains of this Viking colony in northern Newfoundland."
There was a viking occupation - that of pirate or sea raider - but no Viking ethic group.
Calling all dark age Scandinavians Vikings is as accurate as calling all 17th Century British, French or Dutch people Buccaneers.