It's more "A culture that has historically had heavy racism problems should not export their overcompensating hysteria that everything touching on ethnicity/race is racism and consider its own preoccupations universally applicable".
>So what grudges do you think the Irish held leading to this stereotype?
Why not ask the Irish themselves?
https://www.irishcentral.com/opinion/cahirodoherty/why-irish...
https://www.irishtimes.com/news/nurturing-a-grudge-1.315764
https://www.irishexaminer.com/sport/50-year-itch-epic-grudge...
Or on a funny note:
https://lovin.ie/news/feature/18-petty-things-that-irish-peo...