Brendan Rodgers expressed his concern that “the rules of society have changed” after a Leicester fan attacked Nottingham Forest players in Sunday’s FA Cup match.
The holders were thrashed 4-1 by the Championship side at the City Ground as their disappointing season took another negative turn.
As Forest celebrated their third goal, scored by Joe Worrall, a man emerged from the section for away supporters and appeared to swing punches at the group of home players before stewards wrestled him away.
He was later arrested and will reportedly face a life ban from all Leicester games.
Rodgers claimed the incident was symptomatic of “people feeling entitled” to act as they please in wider society.
He said: “The rules of society have changed. There’s a total lack of respect.
“It’s not just in football, it’s in life. I speak to many business people and people in the military, all across society. It’s the lack of respect and people feeling entitled that they can do things.
“The rules of society need to change and we see that lack of respect today. We’ve seen it for the last couple of years. Supporters breaking into stadiums, what is that about?
“You come, you support your team and win, lose or draw, you have respect. It’s lacking in society and it spreads into other aspects of life.
“It’s behaviour that you never want to see. Whatever goes on in the field, it has to be a safe environment for the players, and we must always retain the respect in football.
“Unfortunately the guy has come on to the pitch and was clearly, clearly disappointed by what he was watching.”
The result meant Leicester became the first FA Cup holders to lose a match in the following season’s competition by three or more goals since Liverpool against Luton in January 1987.
They have now conceded 58 goals in all competitions this season, at least 10 more than any other Premier League club.