Jason Kneen received abuse after sharing a photo of his four-year-daughter Rosie, who has Down Syndrome, on social media.
Mr Kneen told talkRADIO’s Matthew Wright that one person described Rosie as “sub-human”.
He had shared a photo of Rosie smiling with the caption: “My child has Down’s Syndrome, what should I expect? This. 100 per cent, this.”
Mr Kneen said: “There was a lot of support but there were also a lot of people saying that we were not being honest.
“‘They have these issues and they will need your constant care when you are older. You are not going to have a life when you are older.’”
Mr Kneen said the abuse was “not direct hatred” but from people responding to new stories or posting on social media.
“There was one guy who said ‘we should not be breeding sub-humans’,” he said.
“And another saying: ‘This is not how we progress the species’.”
Responding to the abuse, Mr Kneen said: “How do you progress the species? By filling people’s lives with love and joy and that is what she does.”
He described Rosie as “always happy”.
He added: “The most amazing person you have ever met. Her smile lights up the room. She loves the family and loves going out.”
But, Mr Kneen admitted that he struggled when Rosie was born.
“The background is because I did not take it very well when she was born,” he said.
“It was all very traumatic – birth is – and they said they think she might have Down’s.
“There was fear and - to my shame – shame.”