I am not saying this because of N.T. Wright, but for any view espoused by a brother.
We simply cannot evaluate the work or view of another without truly considering the work and view of the other in question. When we try, we are in danger of becoming false witnesses and gossips, bring contention into the Church.
This only disqualifies you from having a valid opinion. To be so close minded prevents honest dialogue. So be it. Your welcome.
I am not certain that I can fully agree. One does not have to read every sentence of another to discern the validity of an error, be it from preaching or from a teacher.
To entertain the view that some disqualification occurs because someone hasn't read a specific book, or relies upon the documentation of others, is just incompatible with good discernment.
For example: There is no way to read all that I have written or spoken before someone can comment on whether or not I am loco. Is not this truly a part of the BB culture and even that of the typical higher education?
Besides, authors will change their opinion and emphasis of what they write about over time. So, it is good to have outside resources available to document the general position an author takes and if that position has changed. Did not the OP provide such documentation?
What is important is to make certain the documentation used is from first hand sources. The OP did.
For example: When a student would turn into me a work in which they quoted someone who quoted someone else, then I want to see that the student has done due diligence to look into the account from the original source or as close to the original source as possible.
Not long ago, Darby was being charged as a heretic, and his teaching as heretical on the BB. So, I spent a great deal of time searching and reading what the man wrote. I also made more than one plea to the BB for aid in pointing out the errors from his actual writing.
I showed how that Spurgeon actually misspoke about an issue because he relied upon what a good friend had said and not the actual words of Darby. That, in effect, on the matter in which Spurgeon published disagreement, he and Darby were actually of the same view.
So, first hand information is good, it is vital, and when it is quoted (as was done in the OP) then one must show either the quote was out of context, or the quote is being misread to oppose one who is using the quote. Other than that, the view published by the quote is the focus and not the poster of the quote.
To suggest that the quote is a misquote because one hasn't read enough of the voluminous works a person publishes is weak opinionated thinking at best.