"Racism is combatted with education, condemnation, and discussion," said the FIFA chief, who was a guest on a program aired by Italian state broadcaster Rai.
This comes as Sunday's game was briefly stopped after Fiore's Brazilian player Henrique Dalbert told referee Daniele Orsato he had been the target of racist abuse from fans at the Stadio Ennio Tardini in Parma, where Atlanta's team is based while their ground is renovated.
The referee ordered a warning to be read over the stadium's loudspeaker after the chants were apparently made by Atalanta fans towards the Brazilian player. Atalanta fans have been accused of racism before.
Infantino underlined the importance of "identifying those responsible of racist conducts and throw them out of the stadiums, we need to combat them until they stop, we can't have racism in society or in football, and in Italy the situation hasn't improved much lately."
Inter Milan's Romelu Lukaku and AC Milan's Franck Kessie have also been targeted this season but no club has been punished by the league judge.