In May 1949, almost all of the Grande Torino side which dominated the Italian game were killed when their plane crashed on their return from Portugal.
"I don't believe that the supremacy of supporters should be manifested by remembering the tragedies of others," said Agnelli.
"You see these banners in stadiums all over Italy with gratuitous insults that absolutely have to be condemned.
"It is a shame to see that in a stadium where the atmosphere is noted by the Curva - they have the power to give personality to an arena.
"Tragedies, as far as I am concerned, don't have club loyalties."