Black Irish aren't descended from the Spanish; it's just a description of their black hair, attributed to the pre-Celtic people of Ireland (and Britain). It's a translation from Irish Gaelic: fear dubh is literally 'black man', which is how a man with black hair is described. Someone we would actually call a Black man in English is called fear gorm in Gaelic. Many Spanish have light brown or blond hair as well. Chuck Woollery referred to himself as Black Irish, and if you want other examples, think Matt Dillon, or Kevin Dillon on Entourage.
You wrote: “...most of the survivors were killed by the Irish,...”
Partly true. Many of my ancestors were noted ecclesiastics including the most Reverend Redmond O’ Gallagher (1521 - 1601), a bishop of Derry who was martyred for the aid he rendered to survivors of the Spanish Armada.
I totally agree with your interpretation of “Black Irish.” And as for the actors.... Matt Dillon, Kevin Dillon and even more representative of “Black Irish”... Peter Gallagher.
Yes, and no to the Irish killing off the survivors of the wrecked armada vessel who struggled ashore to Ireland. It would depend on where, as Ireland itself was being contested, and had been for a time previous to 1588. The Tudors were attempting to re-establish English control over Ireland, but that process was not completed until the battle of Kinsale, in 1602. What is known is that those Irish who did attempt to aid the survivors ran the risk of death themselves, and there were no few who actually paid that price...
the infowarrior
It’s also quite rare to find someone with black hair and blue eyes outside of Ireland or Irish ancestry. That is the ‘typical’ black Irish, at least according to my grandma—who herself had the red hair of the Nordic invaders, but she married a black Irish. My dad had black, curly hair and gray-blue eyes. I got his hair, but my maternal Spanish grandad’s hazel eyes.