"Born in Glasgow but was 'Liverpool Irish' how on earth does that work?"
Both of my parent's families were born in Ireland - they moved to Liverpool -and were 'Liverpool Irish'
My father was born in Glasgow because his parents were market traders who travelled the country selling their wares (selff manufactured glue) and that's where they happened to be when my dad was born
They moved back to Liverpool where my dad was brought up
Wasn't it the Duke of Wellington who said "Because you were born in a stable that doesn't make you a horse"
I don't consider myself Irish or Anglo Irish, but now I live here I feel a greater affinity to it than I do England
'What's born in the blood..." as they say
I've got a tee-shirt saying "I'm a blow-in somewhere"

Your story's reminiscent of my mother-in-law's Jewish employer's experienced in Norther Ireland during the troubles
He was stopped at an unofficial checkpoint by armed, hooded men and asked
"Are you a Catholic or a Protestant?"   
"I'm a Jew", he replied
Afret a slightly bemused pause and a whispered conversation between the men, he was asked, "Are you a Protestant Jew or a Catholic Jew ?"
Jim