So let's get this right. Just because the lyrics of a song that appears to be set about Christmas Eve in New York makes two references to Irish songs being sang by:

a) The occupants of the drunk tank, with the exception of the main male character of the song who according to the song "I turned my face away and dreamed about you". Either didn't like or know the song?

b) A non-existent NYPD Choir

There is no mention of any detail regarding the man or the woman the story is about yet for some daft and obscure reason it's:

Irish through and through

I suppose people will read whatever they want into anything as long as they leave common sense, reason and logic at the door.

One question though - There is a band mentioned and also Sinatra so why using the same logic is this not:

"Italian through and through"?