And pardon all the citations. I personally dislike it,but if it helps calm arguments, then so be it.
It’s tempting to take our devotion to the Bible and make the Bible something that it’s not. Protestants do this constantly, but so do so many others. Muslims (believers, not terrorists) are renowned for their devotion to the Koran as "Word-made-Book," and the Vatican 2 fathers praised such devotion as part of their faith (see "Nostra Aetate" 3). Such devotion in general is a profoundly good thing when the faith is founded upon their holy Book that is the once-and-final revelation.
And that's why revelation is closed (CCC 66): because the Tradition is established for all time (CCC 53), not because God one day wrote the final page, then fini.
So to my mind, that’s what’s going on at NCW's blog reaction to the Tabernacle question and eventual admission to denying the Real Presence in the Eucharist. For them, it's an equivalence, but that doesn't elevate the Scriptures so much as it reduces the Real Presence of Christ to something mundane and tangible (several quotes on Diana's blog point ot this), and therefore simply functional to faith rather than the temporal manifestation of this perfect kenosis in the Sacrifice of the Mass at every hour of every day until the End (cf CCC 1325).
And that's at the heart of why the "Jesus is a sinner" comment is so hard for them to let go of as well. And in the end, as I heard a priest say not long ago, all heresies in general come about from an over-emphasis on a point of doctrine to the detriment of another. We must all take care and cling to the Tradition to avoid this.