Carra believes United are doing the right thing in standing by the Scot.
He wrote in the Daily Mail: "Had David Moyes been manager of any other major club in Europe, there is every chance he would be out of his job now.
"The powerhouses, from Chelsea to Real Madrid to Bayern Munich, do not suffer the kind of season Manchester United have endured without taking ruthless action, and defeat like the one against Olympiacos would have been the end for Moyes anywhere else.
"United, however, are different. Like Liverpool and Arsenal, they do things in what I believe to be the right way. History shows they do not panic or make kneejerk reactions: even Tommy Docherty was not sacked when United were relegated to the old second division in 1974.
"But just because United have not panicked doesn't mean they won't be anxious and nobody knows what the Glazer family are thinking. Moyes deserves until Christmas to show he can be a success but, as a wise football man, he will be aware losing makes positions become untenable."
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