While I appreciate your post, there are inaccuracies.I strongly disagree with dispensational theology, but it is not in the same category as the Book of Mormon. Good women and men who want to be informed of the theological world that we are immersed in here in the United States need to be familiar with the basics of dispensational theology so they can properly interact in the Christian subculture.
Faithful Christians often buy into dispensational theology because of its nearly overwhelming support by more conservative Christians bodies since the Scofield Bible became popular. In my own experience, I was brought up with Chick tracts and the "Late, Great Planet Earth" as essential reading in my church. In recent years, the wildly popular "Left Behind" series has brought new generations into the dispensationalist fold. Even at a secular private high school where I worked for a number of years, non-Christians were introduced to the "gospel" of dispensationalism as true Christianity by their friends as a substitute for biblical Christianity. To my great frustration, as a member of the staff, I had to be very careful about my critique of the book. It is only within the last generation or so that there have been voices in popular Christian culture that reject that viewpoint.
So your attitude of "banning" the theology is totally inadequate for the situation at hand. You must show why dispensationalism is wrong and replace it with what is true, since for many people, dispensationalism IS the heart of the gospel.
1. The "Left Behind" series does not tout dispensationalism but premillenialism. (Yes, I read them.) One cannot be a dispensationalist without being premil, but one can be premil without being dispensational. That position is called historic premil, and my father and grandfather both were in that camp.
2. I just taught a 2 week block course on "Dispensational Theology" (40 hours of class time), and at no time did I, the textbook (Ryrie), or any of my students call dispensationalism "the heart of the Gospel." In fact, I utterly oppose such a characterization, and would define any dispensationalist who made that statement as being wrong in the extreme, and possibly even heretical. The Gospel is that Christ died for our sins (proven by His burial) and rose again (proven by the witnesses)." Period, end of story.