All faith comes from God. Rationalism isn’t required.
Let's see how we got down this rabbit hole.
You originally said:
Dispensationalists assert Jews and Gentiles are all part of the Church. The Church and Israel are different objects, though in Prophecy.
To which I responded:
"We know you assert it. We deny you've proved it from the Bible."
Three or four messages later and the context is lost.
Now, what does all that have to do with faith and rationalism?