There is absolutely no animosity towards Americans in Ireland, quite the opposite in fact; I'd say if there was one group of 'outsiders' we would welcome to Ireland first it would be Americans.
BUT what there is, is a deep dislike/distrust of the current US administration, whose policies in Iraq and elsewhere have created instability in the Middle East, caused the deaths of hundreds of thousands of innocents and done untold damage to the reputation of America not just in Ireland but in pretty much every other country on earth. GWB's attitude to the rest of the world has stank, and unfortunately it's the average American traveler who pays the price.
This was blogged in 2007; it starts of extremely positive outlining how welcome Americans are received in Ireland. Historically, from 1848 - 1950 over 6 million adults and children emigrated from Ireland to America as they fled from hunger and disease caused by the famine. Escape was seen by many as the only chance for survival. Americans being well received in Ireland could suggest that they are returning the favor, showing that the relationship between the two countries has grown.
However further down the blog the persons comments tend to shift, giving America a negative view. Even though this person comments negatively on ‘US administration’ they don’t suggest what polices it is that paints America in a negative light, though they have suggested that the U.S have caused more harm in the Middle East. This could have something to do with the Iraq war which many Irish people thought was unnecessary as it killed many innocent people, who caused no threat. The writer also comments on the former president George Bush attitudes on the world, implying that he may have caused the rest of the world to have these negative views of America as he is the face of America.
This quote was taken from the G-8 summit in Japan.
(“Goodbye from the world's biggest polluter." -in parting words to world leaders at his final G-8 Summit, punching the air and grinning widely). Leading many people to believe that many Americans where just like him.