So then you would support minstrels and blackface? Everything you said above would apply equally to a blackface skit. Think about it.
That is not to say that it is not factually accurate, or that it is not a valid opinion. But if you were to replace 'Italians' in your post with any non-European group, it would be sufficient for full 'conviction' in the court of political correctness. It would be enough justification for someone to fire you, blacklist you, expel you from a school, refuse a loan to you, or perhaps to add additional years of incarceration for "hatecrime". It would give sufficient justification for people to openly despise you in polite company. And we would not be discussing it, as the mod would have removed it immediately and possibly banned your username.
Is that disparity proper? is it socially desirable? I don't know - that's a big question beyond my competence. But surely it has nothing to do with free expression or speech. What you wrote is clearly "bigoted" and "racist," -- as those terms are used in the popular media -- it is acceptable, however, because it is "racist" with regard to a group against which "racism" has been approved.
(no flame intended, JMHO
)
But neither of us ever thought that the Sopranos was really a knock on Italian-Americans. Every group has their criminal element. The "mafia" is just more colorful. Ever see "Goodfellas"? True story, directed by Scorcese. How come so many of the "mafia" movies are directed by, written by and acted by Italian-Americans? Are they traitors to their heritage? Or are they just interested in entertainment? 
