Gary Neville and Roy Keane both expressed support for the protests while performing punditry duties for Sky Sports.
Neville said: “This is a consequence of the Manchester United owners’ actions two weeks ago.
“There is a general distrust and dislike of the owners, but they weren’t protesting two or three weeks ago.
“There’s huge discontent. They’re basically saying enough is enough. The Glazer family have been resilient and stubborn for many years. I think they’re struggling to meet the financial demands this club needs and have done for some time.
“If you think about the club they picked up in 2004, they had the best stadium in the country, probably one of the best in Europe; the best training ground in this country, probably the best training ground in Europe; the team was getting to Champions League semi-finals, quarter-finals and finals regularly and winning the league every season or every other season.