Being a pop culture illiterate, I do not know anything about the band, but apparently the drummer for the "Dropkick Murphys", Matt Kelly, has stated on his Instagram that G.K. Chesterton is his favorite author:

Happy birthday to the Prince of Paradox, the Apostle of Common Sense, the man whose face adorns my kick drum... no, not Wilford Brimly, not Teddy Roosevelt, I mean G.K. Chesterton. My favorite author and source of daily inspiration. On this day in 1874 Gilbert Keith Chesterton was born in Kensington, London, England. “The first fact about the celebration of a birthday is that it is a way of affirming defiantly, and even flamboyantly, that it is a good thing to be alive….But there is a second fact about Birthdays, and the birth-song of all creation, a fact which really follows on this; but which, as it seems to me, the other school of thought almost refuses to recognize. The point of that fact is simply that it is a fact. In being glad about my Birthday, I am being glad about something which I did not myself bring about.” GKC 3/21/1935

[Source]