The IT company Mullvad’s founder Daniel Berntsson is behind a giant donation to the populist Örebro Party, which advocates “comprehensive re-immigration” from Sweden. “It’s sad that it’s needed,” he told Flamman.
~ https://www.flamman.se/techprofil-ger-miljoner-till-orebropartiet/


The context you provided isnt relevant, the article is about Sweden. Which, to my knowledge, has no particular history of systemic anti-Irish sentiment so theres nothing for you or your grandfather to relate to.
You are a white. Thats all. Specifying Irish heritage doesnt make you special and just looks like you’re using it to distance yourself from the actions of other white people.
“Don’t worry guys, I’m Irish, that means I’m one of the good ones, not like those other white people” is essentially the tone of your comment. Especially because you specifically differentiated yourself from “other whites” and “pure inbreds”.
Block all you want. You’re still just as white as all the other white people.