http://www.nationmaster.com/encyclopedia/Billy-Bingham
Bingham caused controversy by allegedly conducting the crowd in renditions of Loyalist songs 'Billy Boys' and 'The Sash' when the Republic of Ireland travelled to Windsor Park for a World Cup qualifier in 1993. Bingham claimed at the time that his only intention was to get the crowd behind the team, not to provoke sectarian hatred. The Republic's manager Jack Charlton (who, ironically, later detailed singing IRA songs with the team in his autobiography), refused to shake hands with Bingham after the match.
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To be honest, I just remember him egging on the crowd to sing "There's only one team in Ireland" (that's the part the tv showed as I was watching it in the comfort of my front room) and I didn't see the other alleged incitements mentioned above. I do remember being really p++++ed with him, possibly because we were losing, but he was enjoying it just too much. He is in no doubt a hero to most NI fans just as Charlton is to most of our fans but that alas is my lasting memory of William Laurence "Billy" Bingham.