I will give a hypothetical.
If he was a productive citizen (not the case for this exact person - but many non-native, foreign-born naturalized Irish citizens are not losers and leeches) into a fight with an ethnic Irish adult male that resulted in HIS death... I am sure there would be a full scouring of the ethnic Irishman's full social media history and all possible video and audio would be looking for any ethnic or religious slurs uttered. He would then be described as Algerian in the press.
If you were to point out that the BBC should refer to him as an Irish citizen in this hypothetical scenario, you wouldn't receive a single post from me in disagreement.