The Rossoneri earned a 1-1 scoreline in Sicily this evening, but Giovanni Marchese cleared Robinho's effort when at least the vast majority of the ball - possibly all of it - had crossed the line.
"It's very difficult to tell, but it is a goal," complained Allegri on Sky Sport Italia.
"It's not about the referee or linesman, as it is difficult to tell, but the problem is that there are many who keep on talking and ought to shut up.
"Once again this morning I read that someone wants an advantage from the officials," he continued, referring to Juventus director general Beppe Marotta's interview.
"We played four balanced games this term and each time there were incidents that went against us. They were with Juventus when the Scudetto seemed to be closed off, in Florence and in Rome with a penalty awarded and then taken away.
"Therefore people ought to shut up. I read yet more talk this morning, but the error on Muntari's goal is worth the entire tournament. I never cause controversy, but then these people again insist on talking about the referees.
"At this point, clearly I have to join in and talk about refereeing incidents too."