Graham is set to make his Mackems debut at Reading today and O’Neill cannot wait to let him off the leash.
He said: “Was I put off by the boos? It was a thought. I think he wanted to come and at that stage we were still trying to agree a fee.
“But it didn’t put him off and he was very pleased to come. I was more concerned about our own performance against Swansea on the night than any booing. I didn’t give it a great deal of thought at that stage.
“It was only afterwards when I started to think about it that I worried it might influence him.
“Danny grew up as a Newcastle fan and that is fine.
“I hope I am not speaking out of turn but maybe Lee Cattermole’s dream was always to play for us. Yet when he was at Middlesbrough maybe it wasn’t.”