The Giallorossi captain was only booked when he swore three times at referee Roberto Rizzoli during Sunday's 3-1 win at Udinese and many in the game believe Totti should have seen red.
"He should've been sent off. I watched the footage back and every time my view on the matter only gets stronger," slammed Mancini.
"Those who talk about the common sense of the referee only do so because they are afraid to say how things really are."
Inter were often accused of receiving favouritism from referees during this season, so Mancio pounced on the opportunity to bite back.
"If Antonio Cassano had been in his place and acted the same way, he would have received at least a five-match ban."