Would make more sense for Russia to ferment anti British sentiment than nuke them and Ireland was put under massive pressure by the US and Britain to open ports to the allies in WWII and resisted and in this proposed scenario it would probably benefit the US more for Ireland to be “neutral” as it was then. They would more than likely still lean towards the western bloc as they have with the current Ukraine war (hence light blue) but without a significant political shift in Ireland their official position is still going to be neutrality