Right, let's get a few inconvenient facts out of the way.

In 1939, Ireland was a 3rd World country with no effective air force or navy and a tiny army.

Not 20 years previously, we'd fought a war with Britain (an occupying power for 700 years) followed by a nasty Civil War. https://twitter.com/b_judah/status/1282746624431857667

Despite claims of neutrality however, the Irish state did pick a side.

Downed Allied airmen were spirited across the border to the North to fight another day. German ones were kept in internment camps for the duration of the war.

Crashed RAF and USAF planes were returned too.

The right to use Irish airspace over Donegal was secretly granted to allow USAF flying boats based on Lough Erne to patrol the Atlantic.

Richard Hayes broke Nazi codes that had stumped Bletchley Park and the OSS, and G2 Army Intelligence passed them onto the Allies.

They were instrumental in thwarting Nazi spy rings in Ireland, cracking-open the SS and in the victory at the Battle of the Bulge.

Ireland sent meteorological reports to Britain but NOT to Germany.

It was one of those reports from Ted Sweeney at the lighthouse in Blacksod that convinced Eisenhower to delay the D-Day landings until June 6th, thereby averting disaster.

This may or may not be true, but Donal McCarron's Wings Over Ireland, he claims that Ireland had agreed to allow Britain to use Ireland as an RAF redoubt if the Operation Sealion had gone ahead.

These are just things I remember off the top of my head—there are probably more.

So yes, Ireland was neutral, but it was neutral on the side of the Allies, something many:

1. Neither know nor care about

or

2. Choose to ignore.

And yes, there were vicious anti-Semites in Ireland like Oliver Flanagan and some deeply unsavoury incidents like the murders of Bernard Goldberg and Ernest Kahn (likely by army personnel).

Ireland's refusal to take Jewish refugees WAS shameful, as was the Dept. of Justice's claim that an increase in the Jewish population (around 5,500 in the 1940s) would lead to more anti-Semitism.

There's still research to be done on when the Irish government learned about the Holocaust (likely later than the British), though it was certainly aware of what was happening to Jews in Europe in the '30s.