They killed the men, stole the women and children. Naughty Vikings. I bet the victims were mostly Irish. (As are the majority of locals who claim to be native Australians.)
Irish is like chicken manure. A little goes a very long way.
That and Cherokee.
I swear, in the 1800s there must have only been a few thousand Indians from all the different tribes all over the USA, but at least 100 million Cherokee, given all their self-claimed descendants today.