Irish Bands

After Sara played the Dropkick Murphy's song, "Shipping up to Boston," I've been listening to it constantly for the past two days and trying to analyze the lyrics. Besides the Irish melodies of this band and their associations with Boston (which is one of the most Irish cities in America) their isn't anything particularly Irish about them that I can find. The lyrics to "Shipping up to Boston" seem to have no Irish meaning (or even any meaning in general) that I can find. So what makes this band so Irish and what draws people to them? The only explanation that I can think of to this question is the sound of the band. The dropkick murphy's have a distinct Irish sound to them that reminds me of Irish folk music. Now, most people are no longer interested in Irish folk music so why would so many people be drawn to this band? The answer to this question is the murphy's new twist on Irish folk music, turning it from a soft sounding music to a loud and metal like music that is more appealable to music audiences today.