I think the main teaching of the dispensational school of thought is that God
has two groups, the church (a parenthesis in history) in his plan and then then the ethnic group.
The church age, also called the age of grace, which is now, which is a separate group, will be raptured away and then God goes back to the first ethnic group.
Major problem with dividing the bible like this people were always saved by grace, in the OT and presently.
The ethnic group will
ALL become believers sometime soon ............after the anti-Christ, famines, wars and so on.
So they want us to believe that there have been generations of Jews who were not given this special privilege of whole group salvation, only those living in a certain time, which to them is present day.
How does that even make sense.
Dispensationalism also
denies Christ Jesus/God fulfilled all his promises of the Old Testament, especially the land promise which again is a direct contradiction of scripture found in Joshua and Corinthians.
For all the promises of God find their Yes in him. That is why it is through him that we utter our Amen to God for his glory.
2 Cor. 1:20
Here is a image showing the different dispensations.
View attachment 296062