Gentiles found in a synagogue vs pagan Gentiles
They did not take the same path into the Body.
RD: "This isn't rocket surgery, or brain science."
No: it is worse; it is the surgical hack of the Acts 28er as he approaches the Scripture, imposed on the highly refined skill of the Acts 9.
It is very simple: the Hybrid of both into an Acts 9/Acts 28 view is no different from how some end up leaving Dispensationalism in general.
Such leave Dispensationalism for some other school of thought; when their not yet developed skill at properly studying a thing out on their own, meets with one seeming perplexity or another not seemingly solved for by the Dispensational approach.
Off they go to writers and teachers "without the camp."
The Hybrid is the result of something similar. Only, such within Mid-Acts, turned to Welch and Bullinger in search of possible solutions.
In contrast; the 're-emergence of Mid-Acts itself arose out of the labor of those few within Dispensationalism in general, who simply stuck out the seeming perplexities, knowing they just needed more time in Scripture: further refining through the Scripture: both their greater knowledge of the whole of Scripture, together with a greater understanding of the Dispensational principle that Scripture itself teaches.
This path is very evident throughout the likes of Anderson's; Stam's; O'Hair's; and Baker's both sound assertions, and mis-fires.
Especially in O'Hair's, as he often writes of his previous mis-fires and how he had only much later been able to solve for them.
We can each relate to all that; to some extent.
One of the latter of men such as they once noted it had taken him 7 years in Scripture before he allowed himself to conclude he had finally understood the intended sense of one passage in Galatians he had long been perplexed by.
A great exercise is to take a paragraph, say, from Romans 9, or even from Pastor Joel Finck's great little book "The Power of God unto Salvation" and attempt to work a thing out backwards from either's assertions.
From their assertion; to where they are looking at things from, as implied by their assertions.
This, towards attempting to identify what principles behind how a thing works, and or what principles of study, they appear to be relying on that result in their assertions.
This, in turn, towards making conscious one's own use and application of how one thing or another, is properly studied out.
In a sense, then, RD is actually off-base.
Beyond the basics; the sound study of Scripture in more and more depth is very much like a "rocket science."