It's very easy to overlook the blessings of grace Gentiles have all enjoyed since the fall of Israel:
Romans 11:12-15
12 Now if the fall of them be the riches of the world, and the diminishing of them the riches of the Gentiles; how much more their fulness?
13 For I speak to you Gentiles, inasmuch as I am the apostle of the Gentiles, I magnify mine office:
14 If by any means I may provoke to emulation them which are my flesh, and might save some of them.
15 For if the casting away of them be the reconciling of the world, what shall the receiving of them be, but life from the dead?
The crux of all this is the failure of preaching the truth about Israel's fall, in that there was a long delay to the beginning of the tribulation and the Kingdom so that Gentiles could enter in without having to join with Israel as was the case in times past.
Ephesians 2:12 That at that time ye were without Christ, being aliens from the commonwealth of Israel, and strangers from the covenants of promise, having no hope, and without God in the world:
It is so wonderful what the gift of God's grace has done for us all.
MM