Because it was you who introduced:

"Native Americans landed in Galway in the 1470s." - Stu

Not a shred of proof that they did. This fable has one source - Christopher Columbus, who had a vested interest in promoting the belief that you could sail to China and the East Indies by sailing directly west - after all THAT is what he set out to do when he left Spain in 1492.

Think about it logically Stu:

1: How would they know they were Native Americans? (Answer is in the 1470s they couldn't possibly know).

2: No mention about whether the two individuals were dead or alive (Most likely dead as they themselves do not feature in the account, only the "craft" they were tied to - suggests they were dead to me)

3: No "Native Irish" version of the story exists (For such an occurrence I find that very difficult to believe)