Pawson dismissed the midfielder in the 58th minute with the visitors leading courtesy of a goal from Ludovic Sylvestre.
But substitute Lewis McGugan scored from the penalty spot nine minutes from time to earn a point for Billy Davies' side and leave Ince to rage at the referee.
"We were robbed... totally robbed. It was a poor decision from the referee and I thought he had had a good game up until then," he said.
"I know officials have got the hardest job in the world but I just think at this stage of the season when so much depends on going up and staying down, referees have got to get the big decisions right.
"The linesman has flagged for a free-kick for us and Isaiah has been pushed into the other player. The red card was unbelievable.
"Up until then we had looked comfortable and Forest had run out of ideas but it gave them a lifeline.
"It was a good game until then with two teams having two different sets of game plans.
"But I thought we were doing really well and with a bit of luck could have been ahead early on when Nathan Delfouneso hit the bar."