Justin,
I liked your post. I know I didn't take the time to post excerpts from various commentaries on 1 John 2:27 but all the ones I read pretty much agree that this teaching refers to those without the spirit or the anti christs and does not extend to those with the spirit.
Here is what the Jamieson, Fausett & Brown, The First General Epistle of John commentary said:
27. But--Greek, "And you (contrasting the believing readers with the seducers; the words 'and you' stand prominent, the construction of the sentence following being altered, and no verb agreeing with 'and you' until 'need not') . . . the anointing," &c. (resumed from 1Jo 2:20 ).The highlighting is mine. I find it interesting that each commentary I look at has the same caveat. But, I suppose that is, as you said, to be expected.
received of him-- ( Jhn 1:16 ). So we "are unto God a sweet savor of Christ."
abideth in you--He tacitly thus admonishes them to say, when tempted by seducers, "The anointing abideth in us; we do not need a teacher [for we have the Holy Spirit as our teacher, Jer 31:34 Jhn 6:45 16:13 ]; it teaches us the truth; in that teaching we will abide" [BENGEL].
and--and therefore. God is sufficient for them who are taught of Him; they are independent of all others, though, of course, not declining the Christian counsel of faithful ministers. "Mutual communication is not set aside, but approved of, in the case of those who are partakers of the anointing in one body" [BENGEL]. the same anointing--which ye once for all received, and which now still abides in you.
of--"concerning."
all things--essential to salvation; the point under discussion. Not that the believer is made infallible, for no believer here receives the Spirit in all its fulness, but only the measure needful for keeping him from soul-destroying error. So the Church, though having the Spirit in her, is not infallible (for many fallible members can never make an infallible whole), but is kept from ever wholly losing the saving truth.
no lie--as Antichristian teaching.
ye shall abide in him-- ( 1Jo 2:24 , end); even as "the anointing abideth in you." The oldest manuscripts read the imperative, "abide in Him."