You're absolutely correct.

"They are named after the Vikings of medieval Scandinavia, reflecting the prominent Scandinavian American culture of Minnesota."

https://en.wikipedia.org/wiki/Minnesota_Vikings

Sport team names have nothing to do with declaring ancestry.

Tampa Bay Buccaneers? Las Vegas Raiders?

Do you think the LA Rams have that name to claim ancestry?

This is not the zinger you think it is, my dude.