The US is generally believed to have been the primary source of IRA funding before the GFA. It seems reasonable to assume that Americans care about this issue. You should feel free to ignore the fact that the President-elect and House members representing a majority of the US population have strong feelings about this, since you’ve obviously chosen to ignore this.

Irish americans make up more than 10% of the population. Irish americans are why ireland is free. Irish american money, political power and irish american volunteers were instrumental in winning the war for independence. There are nearly 35 million irish americans. There are less than 5 million irish.

https://www.rte.ie/history/de-valera-in-america/2020/0218/11...

It isn't a coincidence that ireland won its independence as irish americans became major players in politics, business, etc.

1% of 300 million people is still a large political force, especially if they are concentrated in a particular area.