While parts of Israel are definitely in the “church,” The church is definitely not Israel.
The 144,000 will not be made up of gentiles; they all will be genuine Israelites from each of the tribes as stated in Revelation.
The Israel that is within ethnic Israel is called the Remnant. Note that Christ spoke of tares within the church. That is why the church and the Bride of Christ are not one and the same. The church is a corrupt and fallible body.
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Well said