Slavery was large part of the Viking economy. However, combating Nazi cultural appropriation of Viking culture does mean pointing out that Vikings were not just warriors however had complex social communities, adept traders, and explorers.

In a weird way, Vikings may have embraced a type of multiculturalism.

The mobility of Vikings led to a fusion of cultures within their ranks and their trade routes would extend from Canada to Afghanistan. A striking feature of the early Vikings’ success was their ability to embrace and adapt from a wide range of cultures, whether that be the Christian Irish in the west or the Muslims of the Abbasid Caliphate in the east.

https://theconversation.com/vikings-were-never-the-pure-bred-master-race-white-supremacists-like-to-portray-84455