Let's focus on the meat of the matter:
Our purpose in registering with the Department of Public Information as a nongovernmental organization (NGO) in 1991 was to have access to research material available on health, ecological and social problems [...]
I don't think the rest matters that much. First, since "All scripture is inspired by God and profitable for teaching, for reproof, for correction, and for training in righteousness, that the man of God may be complete, equipped for every good work" (1 Tim. 3:16,17 RSV) no additional "research material" is necessary in order to fulfill Christ's commission to feed His sheep. The scriptures alone are sufficient. Second, by their own teachings, it is wrong for a Christian to become associated in any way with false religion, (any religion but theirs) or any political entities, especially that "abomination to God" that is the United Nations. Any JW that shows any support for such things is, by his or her own actions, disassociated from the "worldwide Christian Organization." I don't think it can be argued that association with the PDI was not support. The DPI itself refers to its associate NGO's as partners and it can be demonstrated beyond a reasonable doubt that the WTS upheld its end of the partnership. They may claim "theocratic war strategy" and insist that they had their "fingers crossed" the whole time, but accessing information for books or magazines is not crucial to people's spiritual welfare, i.e. the end does not justify the means.
Thus any justification is a lie unless (1) it can be demonstrated that God required them to access research materials available only at the UN library (I hope this doesn't giv'em any ideas), (2) they concede that the scriptures alone are insufficient to properly educate the man (or woman) of God that he (or she) may be complete, equipped for every good work and that research material available only at the UN library was necessary to complement the scriptures, (3) they reveal "new light," i.e. now its ok to be associated with political entities as long as it's for "research." But even these justifications would be just that, justifications, and with the exception of (1) their actions would still be wrong in the minds of most believers.
Just in case there is still any doubt, the true "litmus test" as to the wrongness of the actions of the WTS on this matter is to observe the reaction of a typical JW (not ex-members, but the sincere, albeit misled, member) upon learning about the Society's former association. "That information cannot be correct!" or, "its a fabrication of apostates!" It most definitely offends their sensibilities and their initial reactions speak volumes.
F G