Dubliners will you help me out?

Travel Info
My question concerns the song: Rocky road to Dublin.
Now the main character yer man,the singer, complains that he was set upon when he got off the boat in Liverpool.He said that he was called a fool.He brags that he eventually got the better of the fight with the help of some men from Galway.
Now two things in this song bother me:
why would Scousers attack an Irishman when most of us are of Irish stcck ourselves.

And what's more puzzling is that he earlier stated that he landed in Hollyhead and wished that he was dead.
I've never heard of an Irish boat dock at Hollyhead and Liverpool in one trip

Travel Tips

You're right, you know, and I never noticed it before. Maybe he got the train from Holyhead to Liverpool. Your other point doesn't stick, I'm afraid. I had a not too happy experience in Liverpool a long time ago even tho' I'm Irish. I won't talk about that one but I'll tell you a nice one. I was on a bus stop and asked a woman for directions. She stayed there til my bus came, letting two of her own go by in the process. The price for such attention? Only that I keep talking in my Irish accent!

Others
Its just a song
Well it is only a song, but it could have been one of the tramp steamers or old mail boats which used to travel those routes years ago
it's a song that was written years ago. the men that attacked him were english.......................... it's a SONG!!!
Don't analyse it, enjoy it
At the end of the day it really is only a song + it was written a long time ago so maybe the attitude to the Irish has changed
what
the person that sang this song must have been drunk or a bit tipsey as us irish would say anyway you would have to be drunk to listen to that song