Thanks for posting interesting stuff, Wallace T. I read that Basques have the highest percentage of negative blood type of any group.
Jacob's twin brother Esau had red hair. As did King David. There are a lot of red headed Jews and they aren't from Ireland. In fact, there are many Persian Jews with red hair who have a tradition that they decended from King David.
There are also red haired Jews of Eastern European origin, Danny Kaye and Woody Allen, for example. Whether their red hair is traceable to pre-Exile Jewish heritage or to later mixture with Slavic or Turkic peoples is difficult to guess.