However, Steinsson has defended the City signing by admitting that "it's healthy" to be passionate on the pitch.
"There was a lot at stake in that game and there had been some aggravation going around," he told The Sun. "One of our players may have aggravated him a bit and maybe he didn't take too kindly to it. He was sent off.
"No player decides before a game that they'll lose the plot. It's just that we are passionate players. There is a lot at stake in these matches.
"I would think there was something wrong with a player if he didn't lose the plot once or twice in a long career. It's healthy to lose it a couple of times."
Steinsson, who joined the Trotters from Dutch side AZ Alkmaar, has made 104 league appearances in five seasons at the club.