It's called fulfillment theology friend. No one has replaced anyone! The "church" started as all "Jews" on the day of Pentecost. Then Samaritans were added and finally gentiles. Read/study Romans 11 - The Olive Tree. The unbelieving Jews were broken off and cast aside. the believing Gentiles were grafted in "among them (the believing Jews)". The unbelieving Jews can be grafted back in when/if they believe. "Grafted in among them" - it doesn't say the Gentiles replaced the Jews but that they were grafted in.....
It's called fulfillment theology friend. No one has replaced anyone! The "church" started as all "Jews" on the day of Pentecost. Then Samaritans were added and finally gentiles. Read/study Romans 11 - The Olive Tree. The unbelieving Jews were broken off and cast aside. the believing Gentiles were grafted in "among them (the believing Jews)". The unbelieving Jews can be grafted back in when/if they believe. "Grafted in among them" - it doesn't say the Gentiles replaced the Jews but that they were grafted in.....
There's lots of room on the olive tree my friend.