The Hibernian midfielder looked odds on to join the Gers until Celtic swooped in.
The 23-year old, self-confessed Rangers supporter, had tried to force through an exit this summer but wasn't granted his dream move, with the Gers having three bids rejected.
Celtic entered the fray yesterday and would now appear clear favourites to secure a deal after talks were initiated.
Ferguson has leapt to the defence of Allan and feels last year’s Scottish Championship Player of the Year is in no way to blame for the situation that has unfolded.
“But before they (Rangers fans) go shouting off at the mouth they ought to stop and think for a minute. Scott might be a Rangers fan but he has never been affiliated to the club from a professional point of view,” wrote Ferguson, in the Daily Record.
“…after hoping for a move to Rangers this summer and trying to force it through, he suddenly finds himself with the opportunity of joining Celtic instead. You can’t blame him for that and he does not deserve to be slaughtered if he decides his future lies in the east end of Glasgow.”
Ferguson, who made 288 appearances for Rangers during his two spells at the club, highlighted the incentives Celtic are able to offer Allan and suggested it makes the midfielder’s switch to Parkhead a no-brainer.
“Celtic are Scotland’s champions. They can offer him European football. They might be two games away from the Champions League. And if they meet Hibs’ asking price they’d probably offer twice as much in wages as he could reasonably expect to earn at Rangers.”
“… if Rangers are unable to match Celtic’s offer – in terms of the transfer fee and the salary – then really the decision is straightforward from a professional’s point of view.”
Ferguson’s comments are likely to invoke the ire of Rangers supporters but there is no denying the truth behind his words.
At this point in time, Celtic are a far more attractive proposition than Rangers and possess far greater financial clout, ensuring they can beat domestic rivals to any player they turn their interest to.