I haven't seen it yet on video but hope to soon. However, I believe he can be blamed to some extent as I don't think he consulted his linesman. Obviously from the Irish players' reaction there was something amiss. Perhaps in the meantime the third official could have looked at the video replay and whispered in his ear.
Sky showed the view the linesman had of the incident and it was a clear view.
ANyway, it gets stored away in the mind of the football disasters but none was as bad as this, although they all felt equally as bad at the time perhaps worse. On this occasion the whole nation and the rest of Europe are aware of the pain. In the past it was mostly just the fans attending the games or looking on from afar which made the pain a bit more personal.