Could both of you list some of the heresies of dispensationalism?
Thanks.
The dispensationalist believes that the sum total of the trajectory of humanity is towards evil. Therefore, he sees little point in being a vessel of prevening grace, of attempting to establish justice, and of providing basic charity to the unconverted; the reign of evil is inevitable and its victory complete. The apocalypse, therefore, is the only means of ending suffering, and he therefore awaits the crisis with joy: He confidently expects that he will not suffer.
The preferred alternative:
Humanity is enterring a deepening crisis between good and evil which is at present a luke-warm numbness. However, the foundation for the glory of Christ is being laid by the grace-inspired works of God's holy people who are building the Church as a fortress against the gathering evil. They avidly pursue justice and charity to bring souls to where they can receive Christ. They pray to hold off the coming trial, until their works of gathering souls to be saved is complete. They expect that the end times will likely bring great suffering to themselves, but they accept that suffering out of their profound love and compassion for sinners; they know that their suffering purifies them, and makes them great among the children of God.
However, I had my tongue slightly in cheek when I declared dispensationalism a heresy. Many of these distinctions, you will notice, are "fuzzy," and comprised more of differences in approach than concrete, irreconcilable, logical differences.
Two of the main heresies are the pretribulation rapture and the radical distinction between the Israel and the church. Related to both, there is also the heresy that God has a plan for physical Jews (aka national Israel) of the future to suffer some unspeakable holocaust for no reason other than they are Jews.
Most of the other quirky dispensational teachings (e.g., teachings on law vs. grace) are related to these major errors.