Long detailed reply fritzed into the ether, so here's the short version.
Ignoring the racist slant, have there actually been any of those red-haired 'Celtic' skeletons or bones found in NZ?
There were some found in China and that doesn't seem to have caused them any problems, despite all historical and anecdotal accounts being dismissed by the establishment until the actual mummies were discovered. http://en.wikipedia.org/wiki/Tarim_mummies
Many legends around the world refer to red haired giants, are there any of these told in NZ?
Something is not right. This message is just to keep things from messing up down the road