It’s an “opinion” you’re unwilling to give without a clear accusation.
What exactly makes a Dispensationalist unworthy of membership in a New Testament church?
I am both. (Christian and Missionary Alliance) church member AND dispensation alist.
I was raised Catholic although I now consider myself a generic Christian. But I retained my focus on the New Testament just as Catholics do. Dispensationalists seem wedded to the Old Testament way more than other Christian sects. I view Jesus as essentially a reformer who was telling the Jews at the time that they got things wrong. He may have been of Jewish ethnicity but what he preached went totally against what Judaism believed. The God of the Old Testament was an angry and tribal God whereas Christianity is a universal religion that speaks of God’s love. How can one possibly read the bible and not notice the difference between the God of the Old Testament with the one in the New? So like I’ve said I consider Jesus a reformer who wanted to convert his fellow Jews to the actual truth of what God was really about. Dispensationalists in my view are just one small step from being Noahides which isn’t Christianity in my opinion. Their insistence on embracing the Old Testament as unerring truth would be an error in my view.