You are the one who needs to go back and re-read this book. I challenge you to produce even one statement by any dispensational teacher that anyone will ever be saved "outside of the church." This is not a term that I have ever come across, even once, in almost sixty years of studying dispensational teaching. The only place I have ever ever met this term is in your continual ranting here.
But you are conflating soteriology with eschatology.
As you very well know, dispensationalists teach, and very clearly teach, that since the time that Jesus died, the sins of no individual will ever be remitted without a true and living faith in the blood Jesus shed at Calvary. Some claim that John Hagee denies this, but if he does, he is not a true dispensationalist.
You apparently define "the church" as "all who trust in the blood Jesus shed at Calvary." If this were indeed a correct definition of the church, then dispensationalists would indeed believe that the future Israelites would be part of "the church," and thus would not be saved "outside of the church."
But dispensationalists do not agree with your definition of "the church." They define "the church" as that group of individuals that at the present time trust in the blood Jesus shed at Calvary. They believe that the church will be physically removed from this planet, and that any who at a later time trust in that same blood Jesus shed at Calvary will be classified as a different group. They will still be considered sons or daughters of God, even as those who trust today, but they will be simply be part of a different group, the first part of which we sometimes call "tribulation saints." And we call the second part "Israel," because that is what God calls it.
We believe, because the scriptures explicitly state it in very many places, that after that the church is removed from this earth God will again bring all Israel back to their ancient homeland, and there bring them to a true and living faith in Jesus, including a faith in the blood He shed at Calvary. So the fact that we consider these Israelites as a different group from those that trust in that same blood today is not some kind of a different soteriology. It is simply a detail of eschatological belief.
Thus, your pretension that this is some kind of a heretical doctrine that anyone could ever be saved without faith in the blood Jesus shed at Calvary is disingenuous. And the fact that you maintain this pretension even after having had this pointed out in the past reveals a basic and fundamental dishonesty underlying your entire campaign against dispensationalism. I do not know, nor do I judge, whether this dishonesty is a conscious attempt to deceive, or is merely what we sometimes call "intellectual dishonesty" that is, a matter of deceiving yourself. But either way, it is obviously there.