The clash between Suarez and Evra remains an inflammatory subject between the rival clubs, who meet at Old Trafford on Saturday in a match that is likely to see the two players come face to face for the first time since their acrimonious October meeting.
Liverpool boss Kenny Dalglish claimed Suarez should never have been suspended in the first place after the Uruguayan made his comeback from the ban against Tottenham on Monday night.
Ferguson says he cannot understand why Liverpool did not continue their attempts to clear Suarez's name if Dalglish believes the ban was unjust.
"They've said plenty, haven't they?" said Ferguson. "Why didn't they appeal?
"We've kept our dignity throughout. We've kept our counsel. That is the right thing to do in these situations.
"We'll keep it that way too, and just concentrate on the game."
That might not be easy, especially if Suarez is part of the Liverpool starting line-up and therefore required to shake hands with Evra prior to kick-off.
But Ferguson insists he is not going to waste time worrying about that part of the pre-match build-up.
"That is not our domain," he said. "There is nothing we can do about these things."
Ferguson has no concerns about Evra's ability to keep his cool after the United captain was subjected to constant barracking from the Liverpool supporters in United's FA Cup defeat at Anfield a couple of weeks ago.
"Patrice has handled it well," said Ferguson. "I don't think he enjoyed the abuse he got at Anfield but it happens.
"Gary Neville had it for 15 years. Wayne Rooney gets it when he plays against them. We expected that and so did Patrice."
Meanwhile, Ferguson is confident both Nani and Phil Jones will be available for some part of the Europa League last-32 encounter with Ajax over the next fortnight.
"Nani had a problem with a small ligament on the outside of his foot," said Ferguson.
"He would have been fit for next Saturday if we had a game but he has a chance for Thursday.
"Phil should also be fine for the game in Amsterdam next week."
Tom Cleverley should also be involved after injury.
Restricted to just five Premier League games this term due to foot and ankle problems, Cleverley was one of the shining lights in United's superb start to the season.
He would also have received a senior England cap had the August clash with Holland not been postponed, and injury ruled him out of friendlies against Spain and Sweden in November.
However, even without a reserve-team game under his belt, Ferguson is likely to have Cleverley on the bench.
"Tom Cleverley has been terrific in training," said Ferguson. "It is a temptation for tomorrow and he will definitely be involved.
"He is fresh for a start but he also has a very quick football brain and is on the move all the time. His positional play is terrific.
"The boy was a revelation earlier in the season.
"We have monitored his career very well because physically he wasn't up to the standards of the Premier League.
"First of all we put him on loan to Leicester City, then to Watford then to Wigan in the Premier League.
"That was terrific for the kid and he came on in leaps and bounds.
"When he came back to us he was a more rounded person but physically he was better as well."