The Portuguese claims that his compatriot never answers "rudeness with rudeness".
"Insults aimed at Ronaldo? I don't think what I say will change anything," he said.
"It is not easy for a player to be insulted every game they play. You can criticise some of their reactions, when he says to the public to continue or discontinue the hostility.
"But I have never seen Ronaldo answer rudeness with rudeness."
Ronaldo has scored 11 goals in la Liga so far this season.