It doesn't look like injustice that he's been locked up in squalid conditions for five months with no trial or process? How long is he going to be there? Is he going to face a trial or tribunal? Is he getting deported?
If you think he should be free to stay in the US, fine; if you think he deserves to be deported, fine; what he doesn't deserve is to be corralled indefinitely in filthy conditions just because they need to meet their quotas.
If you don't think that's injustice then there's something wrong with your sense of morality.
Despite breathless claims to the contrary, I strongly suspect that he could volunteer today to be deported, sign the paperwork and be on a plane back to Ireland within days. The gov't would be perfectly happy to rid themselves of the problem, ban him from returning, and send him on his way.
Though I could believe it would take a little longer right now due to the volume of detentions and the apparent incompetence of ICE.
If you think he should be free to stay in the US, fine; if you think he deserves to be deported, fine; what he doesn't deserve is to be corralled indefinitely in filthy conditions just because they need to meet their quotas.
If you don't think that's injustice then there's something wrong with your sense of morality.