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Isreal was promised land. The church was not
Hebrews 11
13 These all died in faith, not having received the promises, but having seen them afar off were assured of them,[c] embraced them and confessed that they were strangers and pilgrims on the earth. 14 For those who say such things declare plainly that they seek a homeland. 15 And truly if they had called to mind that country from which they had come out, they would have had opportunity to return. 16 But now they desire a better, that is, a heavenly country. Therefore God is not ashamed to be called their God, for He has prepared a city for them.
Isreal was promised they would live in peace with no fear of their enemies, That they would prosper in all they do, and not suffer persecution or tribulation if they heeded the voice of God. The church told even if they heed the voice of God, they will still suffer persecution, tribulation etc etc.
Revelation 21
24 And the nations of them which are saved shall walk in the light of it: and the kings of the earth do bring their glory and honour into it.
25 And the gates of it shall not be shut at all by day: for there shall be no night there.
26 And they shall bring the glory and honour of the nations into it.
Why people want to try to take two promises and try to make them one I will never understand. There is no symbol in "I give this land to you and your descendents after you (only through the promised son) as an eternal inheritance)
If God will not keep his unconditional covenant with Abraham physical descendants, there is no reason to believe he will keep his unconditioned promise to us who came to him in faith.