Take that up with the RCC which evidently disagrees with you. Does that mean you are interpreting for yourself?
To say that the Church replaced Israel is wrong, and the Church does not say that. We are adopted heirs owing our sonship and salvation to Jesus, the Messiah, for which the Jews had long awaited and whom God promised way back at the beginning.
Those Jews who reject Jesus are have chosen to remain under the old covenant. Those Jews who accept Jesus as the Messiah are under the new covenant.
There is no different covenant or dispensation from God to the Gentiles, it is one and the same.
God is unchanging and He told us through His prophets of the OT and we hear it from Jesus Himself, that the salvation Jesus brings is the salvation of ALL and that there is no distinction between Jew, Greek, Gentile, woman, man, slave or free.
God never withdrew His promises to Israel, they are fulfilled in Jesus and we are coheirs.
The Church says that this is the NEW Covenant of the NEW Israel, not a replacement of the old, but the PERFECTION of it.