And at what point do you divide the "ages"? Are their 3 ages? 10 ages? 7 ages? What day did they start on and when did they finish?
The scriptures show God working with man and that works takes time. The great flood took 40 days and nights, the formulation of the world took 6 day (7 if you want to count the day of rest), and moving Israel out of Egypt took hundreds of years. Moving the covenant from the Jews to include all men wasn't transformed overnight at Pentecost. While Pentecost was a significant point in time and the beginning of the church, there was still a maturation process to complete. And it should be noted that it wasn't God fault. It took the Jewish believers a while to understand and accept.
I'm certainly not a dispensationalist nor do I want to be associated with that.
No, there were several dispensations before THAT ONE.
The fact that you agree that the Gentiles were not included in the church from Adam to Christ is evidence that you are a dispensationalist.
Like it or not every Christian is a dispensationalist. God worked differently at different times with different peoples.