Enlarge the place of your tent, and let the curtains of your habitations be stretched out; do not hold back; lengthen your cords and strengthen your stakes. For you will spread abroad to the right and to the left, and your offspring will possess the nations and will people the desolate cities.
Isaiah 54:2-3

Israel will inherit the nations in more than one way. Many gentiles will become Israelites through #yeshua. "Widen your tent," Israel, because you're about to adopt a few million new children from among the nations.

That is not to say that Jacob has been replaced. God will never completely forsake the physical descendants of Jacob. God's plan has always been to restore Israel from the seed of the remnant. Israel can't be unchosen. They will always be His. (Isaiah 54:5-14)