THE MODERN HISTORY OF THE DEAD SEA SCROLLS, with special reference to the controvery about access to them up to 1991, is surveyed in an article in the Jewish Journal of Greater Los Angeles. Surprisingly, it says nothing about the role of the Huntington Library in the controversy when it released its Scrolls microfilms in 1991.
I think the piece is a little hard on the original Christian team, who did put a lot of effort into placing the Scrolls into their Jewish context, although they also were understandably quite interested in their Christian background and they did neglect (through lack of specialist knowledge) connections with Rabbinic literature. And I don't think that any of the team members argued that the "sectarians were proto-Christians," in the sense of their having some clear genetic connection with Christianity. That the form of Judaism represented by the Scrolls had some interesting overlaps with Christianity is hardly under debate.
The article could also have mentioned that the original team spent ten years piecing together the bits of manuscripts that came from Cave Four. The Scrolls did not land in our hands in anything like complete manuscripts. I like to say that their reconstruction was like taking a thousand jigsaw puzzles, mixing them all together, throwing away most of the boxes, discarding 80-90% of the mixed pieces, then trying to reconstruct the puzzles. However much you want to criticize the original team for their policies on access, the collating of the scattered fragments into what was left of the individual manuscripts was a heroic piece of work that took up a large chunk of their careers and for which they rarely receive explicit credit. This article is a case in point.
(Full disclosure: I was one of the postgraduates in the 1980s who received Scrolls from team members to publish in our doctoral dissertations. For the record, I did not turn down any requests from scholars to see the material I was working on, and as far as I know, none of those other postgrads did either.)