Anti-fascism campaigners have called for Paolo Di Canio to publicly retract comments about his political views.
Unite Against Fascism's joint national secretary, Weyman Bennett, said his appointment was "an insult" to the people of Sunderland:
If he wants to be a manager and wants to be a public figure, he needs to make it clear he accepts these views are completely inappropriate.
Football has made great strides in opposing fascism. It's simply not true that you can say you agree with fascism and that's okay. It's something that isn't acceptable.
Sunderland manager Paolo Di Canio denied he was a racist or fascist after his controversial appointment received fresh criticism.
Yesterday's press conference at Sunderland's Academy of Light training base was illuminating in every way but one.
Paolo Di Canio refused to answer questions on whether he is a fascist but said the controversy surrounding his appointment was "ridiculous."