An anti-Galzer faction has been mobilised within the United fans, but Ferguson has urged the fans to stick with the team.
“The family of Manchester United is under pressure as a result of all the issues surrounding the ownership and financial situation of our club,” Ferguson said in the official match programme, United Review.
“Some of our fans are clearly unhappy with our financial position, but we mustn’t allow the situation to become divisive.
“The danger is that we could be presented as being split, which would be harmful and inaccurate, because I believe the vast majority of United fans are behind us and appreciate the importance of standing together in support of the team.
“I could see our opponents rubbing their hands with glee at the thought of watching us fall out among ourselves if we don’t think carefully about what we are doing.
“We must not lose our focus – which is about building a strong football team that will win trophies. That is what we are about, or at least it should be.
“We must remain loyal to the cause of Manchester United,” he continued.
“The staff and players should be quite one-eyed about that and stay true to the history of the club and all the work done by Sir Matt Busby and the other managers who have contributed to creating the great club we have at Old Trafford today.
“This is not about stifling criticism. It is simply a plea to stand together rather than take action that will damage ourselves more than anyone else.
“Manchester United is bigger than me, the players, the directors, the officials and fans. And, particularly at this critical stage of the season, we need to pull in the same direction.
“It would be a shame to lose our concentration now because I can really see light at the end of the tunnel as we ready ourselves to push for the championship.”