Rashford clashed with Red Devils captain Maguire during United’s goalless draw with Crystal Palace on Wednesday night.
The forward told his United and England teammate to ‘shut the f*** up’ after being criticised for failing to stay onside during an attacking move.
But Berbatov was not concerned by the row and in fact says he ‘liked’ seeing Rashford and Maguire arguing because it demonstrated passion and commitment to the cause.
He told Betfair: ‘Things got a little heated with Marcus Rashford and Harry Maguire, but I like that. It’s good in a game to have that fire and passion to fight.
‘Aggression shows you are passionate and you care about the game. You don’t want to be silent, because that tells me you don’t care.
‘Of course, things like this need to stay on the pitch, although you might carry it on a little bit in the changing room, but as long as it doesn’t interfere with your commitment to the team, it’s ok.
‘These things happened to me when I was playing. I’d tell defenders how to do their job and defenders would tell me how to do my job when I wasn’t scoring goals.
‘When things aren’t going right in a game and you think your teammates can do more and you are running high on adrenalin, you need to push and push and even argue with teammates if necessary.
‘I had it a lot in my career, arguing and screaming with teammates, and I’m fine with it. It’s all for the purpose of helping the team to win games.
‘Rio [Ferdinand] used to always run his mouth and tell everyone what to do, I used to give it back to him by telling him how to defend and to pass it to me, to my feet, instead of clearing the ball high.
‘It’s always good to put a bit of fire in your teammates, it’s a two way street and when you play on that to help you win it’s a good thing.’
The goalless draw at Crystal Palace left Manchester United 14 points behind Premier League leaders Man City, who they face on Sunday.