Jack Campin -

Take a deep breath, drink a glass of water, and calm down.

Black intellectuals in the United States in the nineteenth and early twentieth century often referred to the African-American population as 'the Race'.

Chicano activists in the 1960s and 1970s used the term 'la Raza' to refer to Mexican-Americans (the term is still tossed around, but not quite so much).

And, yes, Irish nationalists often spoke of the Irish or Gaelic race.

What exactly is your problem? Will you now go out trolling and leave nasty messages on other sites about these terms and the writers, artists and activists who used them? There is nothing in the song you linked that even hints of racial hatred towards those not of the 'Gaelic race' (inaccurate though the term may be). Why are you so incensed?