Journalist Mario Adinolfi tweeted the actress was attempting to "justify high-society prostitution", while others have questioned why she did not speak out earlier.
Ms Argento has now said she will move from Italy to Germany and criticised the "climate of tension" and "victim blaming" in her home country.
"Italy is far behind the rest of the world in its view of women," she said in a recent interview.
"I don't see what I can do there - I'll come back when things improve to fight alongside all the other women," Ms Argento added.
"I didn't have to courage to speak until now because you see what happened, 20 years after the attack?" Other actresses have supported spoken of a similar culture in Italy.
Jessica Chastain, the star of Zero Dark Thirty and Interstellar, tweeted:
Mr Weinstein has denied that any on his relationships were not consensual.