Dalglish wrote in the Mirror: "Its publication – and some of the upset it has caused at Old Trafford – is hardly ideal for David Moyes.
"It was a bit odd to see Sir Alex’s comments on some of the players who had served him so well and had brought the club so much success, too.
"The Scot made a big contribution but so did players such as Roy Keane, David Beckham and Ruud van Nistelrooy. It was sad Sir Alex felt the need to attack them after everything they had done for him and United.
"As a manager, you are going to cross swords with players over the years and fall out with them. It is bound to happen.
"But why dig all that up now and berate them in public? Sir Alex did not need to settle any scores because he brought tremendous success to the club.
"Anyway, it is understandable that some players wanted to move on from United. It happens.
"After all, he did not hesitate to move them on when he felt they were no longer of use."
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