An unbiased review of the Steele Dossier was done by a blog called Lawfare. It is neither affiliated with right wing or left wing political organizations or groups. It notes:
"The dossier compiled by former British intelligence officer Christopher Steele remains a subject of fascination—or, depending on your perspective, scorn. Indeed, it was much discussed during former FBI Director Jim Comey’s testimony in front of the House Judiciary Committee on Dec. 7. Published almost two years ago by BuzzFeed News in January 2017, the document received significant public attention, first for its lurid details regarding Donald Trump’s pre-presidential alleged sexual escapades in Russia and later for its role in forming part of the basis for the government’s application for a FISA warrant to surveil Carter Page.
Our interest in revisiting the compilation that has come to be called the “Steele Dossier” concerns neither of those topics, at least not directly. Rather, we returned to the document because we wondered whether information made public as a result of the Mueller investigation—and the passage of two years—has tended to buttress or diminish the crux of Steele’s original reporting.
The dossier is actually a series of reports—16 in all—that total 35 pages. Written in 2016, the dossier is a collection of raw intelligence. Steele neither evaluated nor synthesized the intelligence. He neither made nor rendered bottom-line judgments. The dossier is, quite simply and by design, raw reporting, not a finished intelligence product.
In that sense, the dossier is similar to an FBI 302 form or a DEA 6 form. Both of those forms are used by special agents of the FBI and DEA, respectively, to record what they are told by witnesses during investigations. The substance of these memoranda can be true or false, but the recording of information is (or should be) accurate. "
If someone who knew what raw intelligence looked like received some, their reaction should be to turn it over to the FBI for investigation. McCain did that. What would you have him do, destroy it?