The guy is a fucking idiot.

he decided to register his heritage with the Irish government when he was 22

Except for official purposes like applying for citizenship why else would the irish government care about your “heritage”?

He didn’t understand that would automatically be treated as an application for Irish citizenship or, crucially, that he would immediately lose Australian citizenship as a result. 

Mr Keogh received Irish citizenship and a passport

This clown “accidentally” applied for, and received irish citizenship, and lost Australian citizenship due to a law on the books for over 50 years

Between 1948 and April 4, 2002, Australian adults who got a second citizenship automatically lost their Australian citizenship.

And between November 1984 and April 2002, they didn’t even have to be outside Australia when they took up their second citizenship to trigger the loss of their Australian rights.

www.abc.net.au/news/2023-02-11/…/101929662