I feel like a tabloid journo here, but I did work for a company now owned by News Corp, so...
The shooting there was a Hutch/Kinahan feud incident. The Hutches come from north inner city Dublin (where I work). The Kinahans are from The Liberties which is around where the Guinness brewery is -...
The shooting was in Whitehall, the other side of the city entirely - and was related to gangs local to that area who have mostly killed each other quite well.
Crumlin was rough until the early 1990s. McGregor relies on the image that it is still the early 1990s there.
There's one pub there...
I really want the mouthy Crumlin gobshite to be shut up for a bit. Entire image is based on being unbeatable (even though he has lost).
He's effectively the mouthy wee shit from the smoking area in the Four Roads who went to the gym a lot and somehow made it big.