It's still Israel; it hasn't been replaced. Paul clearly said that unbelieving Jews were not Israel, so its error on your part to include them.
I was born a Jew.
Jewish until I reached salvation in Christ.
You are a Gentile?
I am assuming you are.
"Therefore if any man be in Christ, he is a new creature:
old things are passed away; behold, all things are become new. !
2 Corinthians 5:17
Both Jew and Gentile have now have become a new creation in Christ.
The Greek word translated as 'new' does not mean God has made you to become 'like new.'
It actually means?
We have been made to be a new creation, unlike anything else before in creation!
Not like a Jew. Not like a Gentile.
That means?
We are not taking over for the Jews what they stopped doing.
We are into something totally new and different.