If you don't want to believe what the Italian law is like, I just tell you this will not change facts. The law is like that. Your belief that it offends human rights is absurd in law, but if you want to think that, it's not my task to convince you. If you just don't believe I suggest you to get informed. It makes no sense that you try to argue with me what Italian law is like. Italian law is not a secret, not something that I have to convince you about. I have no interest in telling you something different from what it is. I don't want to spend my time trying to convince you of what is self-evident: look at the procedure code, study it a bit, ask for counsel.
The Italian Law is valid in any international venue. But in particular in the European Union. You can easilly get acknowledged of this too.
It is necessary to be precise on a point: we are not talking about custodial interogations. The police interogation we are talking about was not a custodial interrogation. The Italian police cannot write minutes of custodial interrogations.
The interrogation we are talking about are all interrogation of "witnesses", people legally free. The free people, in Italy, are not maybe as "free" as in the US free citizens on many aspects. They have duties that the US citizens don't have. For example, they must have a valid ID document always with them, otherwise they can be fined and are "identified" which means have comply with some police requests (follow them, signe papers and so on); they also have to "comply" with public officer requests on a number of occasions.
Answering questions as a witness is not a duty in a custodial interogation: it is one of the duties of the "free citizen".