I was raised a Methodist (but also went to Mass with Catholic cousins). Not much left of either denomination.;-)
That left me in quite a quandary, leaving me without a clear definition of Eternity or that it should influence my existence or behaviors at all.
But finally, the early ingrained childhood experiences with believing church people, youth camps, and a deliberate reading of the entire NT, the impact came to persuade me, a depraved very guilty sinner, that Jesus acceptance of my appeal to Him and The Father was the only way out to bother living my body out until it wore out. That deeply changed my mental state into one that the Bible commended. That change and my begging appeal to the Father God got me forgiveness (=justification), freedom from guilt, and permanent fealty to the Christ of the Bible, not the distant religious godlet of the denomination's liturgy. With that change and opennes to the supporting Spirit-born Friends that Jesus sent my way to comfort, help, and advise me, made al the difference in the world.
That change pinpointed was May 24, 1971, 54 years ago, and has changed only for the better ever since.
From my experiences, I see that all, or perhaps nearly all, of the mainline denominations under extra-local supra-church polity, are exactly those that Brentner speaks of in a negative way. Although I wish he had differentiated between non-catholic "churches" versus the true local faithful independent autonomous Bible=preaching Spirit-led assemblies that exercise church discipline when scripture commands the local elders to exercise it. Nor any deluding infant 'baptisms"; sprinkling, dabbing, christening, that are not consistent at all with a believer's conduct in the local assembly.
Fare thee well, RR! I love and try to lead Romanists to the Real Christ, but to the depth I hate the falsity of ther dogmatism and unscritural teachings that indoctrinat impressionable adolescents while hormones are surging through their brains, that cement them to a rock of unbrlief in the salvation offered by my Heavenly Father.
"But avoid foolish questions, and genealogies, and contentions, and strivings about the law; for they are unprofitable and vain.
A man that is an heretick after the first and second admonition reject; Knowing that he that is such is subverted, and sinneth, being condemned of himself" (Titus 3:9-11 AV).
There is a time when only God-commanded rejection will work toward driving thjem nearer to the healing fellowship of the Jesus of the Bible, no matter what others say or condemn you for.
" Whosoever therefore shall confess me before men, him will I confess also before my Father which is in heaven. But whosoever shall deny me before men, him will I also deny before my Father which is in heaven" (Matthew 10:32-33 AV)
The Jesus that the Romanists is another Jesus of the same kind than the one told of by JWs or Mormons or Islamist, but that is still another, not the Jesus of the Bible that Saul of Tarsus, Paul renamed by Christ, identifies as different from the false christs preached by imitators of The Faith.