https://offshoreleaks.icij.org/
The current data leak is a bunch of unprocessed files and emails that would be irresponsible to leak as it could contain private information such as passport scans of no public utility. They said they are in the process of cleaning that data to later make it available.
Personally, I presume the revelations are very selective.
It will be very responsible to do so to people who have absolutely no reason to hide their wealth, especially in countries without public security problems. It is very morally correct too.
Aside from the fact that many of these structures are not illegal, and are often declared to local tax authorities of the resident, these are private matters. Plenty of money is laundered through onshore jurisdictions as well -- this has nothing to do with the entities itself.
> These documents were stolen
We don't actually know how they were obtained. But given that they were obtained at all, I'd say that the custodian of that data was the principal guilty party.