This is an interesting position. One that I would say could not be dogmatically supported or rejected. Like Salty, I have never heard this position before, lol.
John was filled with the Spirit of God:
Luke 1:15
For he shall be great in the sight of the Lord, and shall drink neither wine nor strong drink; and he shall be
filled with the Holy Ghost, even from his mother's womb.
I'm sure you understand that the filling of the Spirit is an empowering ministry of God in both the Old and New Testaments. Some view the filling as an equivalent to the eternal indwelling of God promised in the Old Testament but received by believers when the New Covenant was established.
I think the most relevant issue of John's condition in the context of this discussion is that we see that John was, before he was born, a person. He had a conscious understanding:
Luke 1:41
And it came to pass, that, when Elisabeth heard the salutation of Mary, the babe leaped in her womb; and Elisabeth was
filled with the Holy Ghost:
As far as the entirety of your post, the issue that stands out for me is the condition of the babe in the womb from a salvific standpoint: I don't view babes in the womb as "innocent," because they are separated from God just like those who are born. John, in the womb, filled with the Holy Ghost—was separated from God. He was "innocent" in the sense that he had no capacity to commit sin, nor to turn in faith to God or Christ, but his death in the womb would not have been a candidate for Heaven because he never sinned (for that is impossible in the lives of natural men), but rather he would have been judged in the same manner God always judges men throughout Scripture: according to their response to the revelation he has provided to them.
There is a principle set forth in Scripture that God will judge men according to their understanding of the revelation He provides. In Hebrews 10—
Hebrews 10:26-29
King James Version
26 For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins,
27 But a certain fearful looking for of judgment and fiery indignation, which shall devour the adversaries.
28
He that despised Moses' law died without mercy under two or three witnesses:
29
Of how much sorer punishment, suppose ye, shall he be thought worthy, who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and hath done despite unto the Spirit of grace?
The above contrasts the ones rejecting God's will under the (Covenant of) Law with the ones rejecting God's will under the New Covenant. They have rejected ...
1. The Son of God;
2. The Salvation of Christ;
3. His death;
4. His Covenant (promised in the Old Testament);
5. The convicting ministry of the Comforter (the Spirit of Grace).
There is more severe judgment for those rejecting the revealed Gospel of Christ (previously unrevealed in past ages and generations) than for those who rejected "Moses' Law," or, the Covenant of Law. Jame wrote, "Be ye not many masters/teachers, for we shall receive the greater condemnation/judgment."
So I would suggest that babes that die in the womb will be judged according to the consistency of God, Who is just to judge men accordingly, rather than a blanket condemnation among them.
Continued...