Ole Gunnar Solskjaer has reiterated his belief that supporters must be heard - but the Manchester United boss still felt the anti-owner protest that forced Sunday's clash against Liverpool to be called off went "too far".
Having controversially taken over at United in 2005, the already despised owners' botched attempt to join the breakaway European Super League brought anger against them to a new level.
Thousands of protesters descended on Old Trafford demanding change at an anti-Glazer protest before Sunday's high-profile Premier League match versus rivals Liverpool.
A few hundred of those got into the stadium and invaded the pitch during the protest, while another group made their frustrations clear at the Lowry, the team hotel in the city centre.
"It was a difficult day for us," Solskjaer said as he spoke for the first time since the postponement.
"Of course, we wanted to play, we wanted to beat Liverpool for the fans because our job has to be getting good performances, good results on the pitch.
"That's the players' focus, that's my focus but, as I said before the game, we have to listen.
"We have to hear the fans' voice. It's everyone's right to protest, it has to be in a civilised manner, though. It has to be in a peaceful manner.
"Unfortunately, when you break in, when police officers get injured, scarred for life, that's too far. That's one step too far.
"When it gets out of hand like this, it's a police matter. It's not about showing your opinions anymore."
A Greater Manchester Police spokesman said on Tuesday that six officers were injured as flares were let off and bottles thrown, with one sustaining a fractured eye socket and another a facial wound.
A man has been charged for his behaviour outside the Lowry Hotel and the force spokesman said the incident had been referred to the Independent Office for Police Conduct to "ensure complete transparency and independence".
"The right to protest peacefully, everyone's got a human right to be heard and a voice to be heard, but it has to be peaceful," Solskjaer said.
"When you step out of line, when you break into, on to the pitch and into dressing rooms, I think that's one step too far and when it becomes police matters, that's not nice.
"It's not been helped by certain individuals. I have to say that's another part of it. But that's your end of it (in the media)."
Australian Associated Press