Sir Alex described his former captain as an "intimidating, ferocious individual", adding that "he has the most savage tongue you can imagine", in his recently released autobiography.
Keane has stoked the feud this week by claiming the Scot wields too much influence at Old Trafford, insisting "everything is about control and power" in regards to the former manager.
But McQueen feels the tensions between the pair serves as a negative distraction, with United's title defense at a critical stage following back-to-back home losses for the first time in over 10 years.
"This feud has been simmering for a while, but it's reached boiling point now and I don't think it does any good for those who claim to have United at heart," McQueen told Goal. "Clearly there is bad blood there and no love lost, but it's time Roy drew a line under this and moved on. This is a time when all Manchester United people should be pulling in one direction. The club is going through difficult times and the last thing it needs is for two of its greatest servants to be having a go at each other in public.
"I don't think Roy has said anything that directly unsettles David Moyes, but any negativity at all is amplified when you are a club like United. Roy says he has fallen back in love with United and he and his son have season tickets at Old Trafford. There is no doubt he is still popular with United fans, but Sir Alex is more popular and perhaps he should think about that when he takes his seat there. The only winners in all of this are book publishers and United's rivals, the latter of which will take more heart from United ‘greats’ fighting amongst themselves."