(Note offensive language in paragraphs 10, 15.) By Rich McKay and Brad Brooks BRUNSWICK, Ga. (Reuters) – A federal prosecutor in Georgia said on Monday that three white men on trial for hate crimes in the murder of Ahmaud Arbery, a 25-year-old Black man, had a long history of using racial epithets and undoubtedly killed him because of his race. Arbery did nothing to deserve his fate, Barbara Bernstein, deputy chief of the Department of Justice’s civil rights division, told the U.S. District Court in the coastal town of Brunswick in her opening statement. Gregory McMichael, 66, his son Travis M…