What if the state of Israel fell and Christ did not return?

Practically, nothing in terms of God’s plan. The physical kingdom of Israel fell long ago and was supplanted by the spiritual kingdom of Israel we call the church of Christ. This kingdom has the law of God written on their hearts by the constant indwelling of the Holy Spirit, who previously only acted internally as He would in certain individuals in certain circumstances. 

This kingdom does not have physical boundaries and holy places. We are the temple that God inhabits and we carry the kingdom of Heaven with us wherever we go.

This kingdom has an eternal king that set aside His glory for a time, joined us here in the material plane, and revealed the character of God as loving, forgiving, and sacrificial for His children.

Do not lose hope if the state of Israel falls and Christ does not return. He will come when and as the Father intended. His is the kingdom and the power and the glory forever, amen.

John 18:36

Jesus answered, “My kingdom is not of this world. If my kingdom were of this world, my servants would have been fighting, that I might not be delivered over to the Jews. But my kingdom is not from the world.”