Dublin in the rare ould times has a very catchy singeable melody.

But he tells us the gargle has dimmed his brain."
that does not mean he is a drunk, alcohol even in moderation dims everyones brain, that is why there are drink driving laws, even a pint affects or dims your brain.
no i dont buy that, just because he saysits dimmed his brain does not make him a drunk or alcoholic
and even if he was an embittered old drunk, which is debatable, there is no need for the racist stuff, would it be ok if she had gone off with a dub or a tipperary man