Well, the locals handled it well. Other places in Ireland may not have had the same success. Unless you're from the community calm the fuck down.
Look at
what happened in the Alps, it took a guy with courage and self-possession to stop it getting worse. There were numbers in Parnell street to stop it quickly.
RTE News made no direct reference but he does look Arab in the picture above. The Gardaí said that they didn't think this was part of a wider plot but to attack a Gaelscoil - that's a national attack, not an opportunistic one. Their statement that it doesn't look like a wider plot indicates the question of a terror attack, which is an admission that it's a foreign national. They mentioned that two were seriously injured and in surgery - no deaths reported yet.
This will put migration control - particularly from the Arab world - on the political agenda. It will probably happen quietly. McDonald visited the scene. Wonder what will happen with them, they're deeply invested in open migration and Palestine.
There's a question you have to answer - do you want to brawl or do you want to win?