Ferguson believes it was how he handled the Luis Suarez racism case.
Dalglish was axed at the end of the season - mainly because the Reds finished in eighth spot - or so most of us though.
But everything was overshadowed by Suarez being found to have racially abused Manchester United defender Patrice Evra at Anfield last October.
A subsequent eight-match ban and £40,000 fine was followed by Liverpool players wearing T-shirts in support of their South American team-mate, with Dalglish opting to keep the argument rumbling on rather than simply apologising.
Ferguson: "I wasn't surprised at Kenny leaving.
"It certainly wasn't a nice thing to happen and it must have been part of it.
"It's not going to go away if Suarez keeps on making headlines out of it.
"It was nothing to do with Manchester United.
"It wasn't Evra's contribution, it wasn't Suarez's contribution. What killed Suarez was the guy who explained the cultural differences.
"I think Evra expected him not to shake hands.
"He actually said that to the lads. He just felt that he wasn't going to shake his hand. He was embarrassed to put his hand there.
"But there is no doubt Evra put his hand towards him.
"It's Suarez who should be making the effort to do something about it.
"I don't think there is cause to worry about racism in England.
"Since I have been down here we have made great strides forward.
"I don't see any problem with the game in terms of race."