I took it as being written by an Irish Prod.
Probably right—While I was able to spot the secondary joke, I was wondering who might come up with something that subtle and why.
For a more neutral (and accessible) self-effacing Irish piece of humour, I offer “The Orange and the Green” by the Irish Rovers
https://www.youtube.com/watch?v=Qqs4EbU02As
That was excellent, thanks I really enjoyed that.
I’m 50% Irish, my mother’s side 100% Irish.