Arsene Wenger felt Arsenal fans were with him during their FA Cup win over Aston Villa.
Wenger had been given a rough ride by some home supporters following last weekend's 2-1 defeat by United, which was a third straight in the Barclays Premier League to lose ground on the top four.
The Arsenal manager said: "I felt they were quite positive [on Sunday] compared to last time.
"I just want to do well for this club that I love. I understand that people question my decisions, but I wouldn't understand if they questioned my commitment and my dedication.
"The rest I understand, that sometimes people are not happy with my decisions.""I am sad we cannot always keep them happy, the only thing we can do is show the spirit that we showed today.