Why did Luis Suárez's 2014 World Cup controversy become so infamous?

Luis Suárez’s 2014 World Cup incident became infamous after he bit Italy defender Giorgio Chiellini during Uruguay’s Group D match on June 24, 2014, in Natal, Brazil, at Arena das Dunas. The contact happened late in Italy’s penalty area, near the end of the decisive contest. Officials did not penalize Suárez on the field, though television footage captured the bite. FIFA opened disciplinary proceedings on June 24 and announced them publicly on June 25. Italy’s Claudio Marchisio was sent off in the 59th minute, and Diego Godín scored from a corner in the 81st, giving Uruguay a 1-0 win and advancement. The article also recalls prior biting bans: 2010 with Ajax and 2013 with Liverpool.