Hello @Vieira
That is ture that the while the English had slaves, the vikings made slaves out of the english.
There has been a misunderstanding by the common people around the world that the vikings were nothing but barbarians and savages, but they actually were so much more.
The had a rich culture, the were great explorers and tradesmen and the were the one that founded a lot of citys around Europe. Eks Dublin in Ireland had not been if it weren't for the vikings