gracias facha

ta facha el skin

Wikipedia isn't the "Holy Bible", because it's often written by people who don't have the historical skills that university degrees bring in this subject.
Historians are asked above all for objectivity, and rigor to understand the facts, not to judge them.
If you want to know something, it's better to turn to serious studies (and recognized as such) carried out by specialized authors.
Moreover, errors, repeated tens or hundreds of thousands of times, and such as this appears as the result of a search query on Internet, don't give a single truth ...

dgn and andros you are both wrong please look at wikipedia and adjust your incorrect historical chatter.

The Irish were not pro-german sympathizers. They done military exercises with the UK and even sent volunteers to England to fight in the war. Just the helmet having a similar shape doesn't mean anything.

That's what you might think, at first glance.
But this is a helmet created and manufactured by an English firm, Vickers ...
Moreover, part of Ireland was occupied (even annexed) by the English Army, which could encourage to turn to one of his opponents. The English Army occupied other territories around the world (and practiced the same methods of repression there), where the same mechanism worked.
Isn't that what the Jewish Agency did, in the person of Haim Arlosoroff ?

historically accurate pro-german sympathisers

No problem !

Yes, it's the pre-war/early war irish army. Thank you!

With the Vickers helmet ?
Nice !