So they come from a heritage that has strong traditions that everyone enjoys such as st patricks day, irish pubs, irish dancing for the dc to name a few and that continues the connection and for them a pride in their heritage.
My cousins in canada do Scottish highland dancing, go to celidhs, visit Scotland with their dc and that connects then. Perhaps tidy find the quaintness of a small country endearing. In years and generations to come I guess it will lessen as the family ties become weaker but if they enjoy it now why not.