Journalists are not supposed to just do document dumps. They are supposed try to figure out what is true and what is not. Take the documents and investigate. They are not just a middle man to funnel information to the public

Buzzfeed got their hands on some opposition research that was circulating around. A lot of it was unconfirmed at the time (some has been verified since, some has not). There were also a lot of errors.

Without independent verification and actual journalism, what makes the publication of the dossier different than publishing a report that Ted Cruz's dad was somehow involved in the JFK assassination?

Flooding the public with raw, unverified information and the telling them to decide what to do with it is bad. Maybe not quite fake news as it is currently defined, but definitely not "good news"