Stupid ass...stop posting nonsense, many Irish women chose to marry Black men which outraged White Men who then made it illegal.
Show us one example of an Irish woman prior to 1840 who voluntarily married a black man.
I am sure that they existed, but it was so rare, it is hardly the explanation for all the white black half breeds in the South and West.
The people who owned slaves wanted to cross breed ethnic groups and races to get an improved breed, it is called
heterosis, and they used Irish slaves as well as black slaves to do it. The laws against inter-racial breeding were intended to stop this sort of abuse.
This is going to play out in further inter-racial mixing that will largely break down the idea of races, much like it did in most of Catholic areas of the Carribean and Brazil. I dont know how many times I have heard from Puerto Ricans and Dominicans that their families had people of all races in it, much like George Zimmerman's family does, and yet he is generally considered white still.