It has been reported that Mackay missed out on becoming Crystal Palace manager due to a dossier of alleged misconduct given to the Football Association by Cardiff chairman Vincent Tan, with racist, homophobic and sexist messages believed to be the subject of the documents.
Farah, who left Cardiff in 2012, appears to have backed up those suggestions by claiming that Mackay was racist on a number of occasions in front of him, and that he referred to him as a "wee Egyptian" despite being born in Wales and having parents from Somaliland.
Malky mackay is racist wish the people at cardiff city seen it sooner— Ibrahim Farah (@Ibby_Farah) August 20, 2014
Every manager has his views on his players I wasn't his type of player but to treat certain player on how he did at cardiff was disgusting— Ibrahim Farah (@Ibby_Farah) August 20, 2014
Mackay is yet to respond to the reported dossier put forward by Tan.