 The feud stemmed from his ejection from the band, how it was conducted, and disagreements on songwriting credits.Mustaine expressed his anger in the movie "", in a scene he later disapproved of as he felt he was mischaracterized, and that it did not represent the full extent of what happened during the meeting.During a live performance of "Anarchy in the U.K." at a 1988 show in Antrim, Northern Ireland, Mustaine drunkenly and confusedly dedicated the song to "the cause" of "giving Ireland back to the Irish!"