Perhaps you have forgotten….. but the story in the bible did not end with the Jews getting the Promised Land. They kept disobeying God and eventually even Jerusalem was destroyed. Jesus even told them the kingdom would be taken from them and given to a nation producing its fruits because they rejected the messiah when he finally did come.
You are leaving out everything that happened after they got into the promised land and thousands of years of history after that.
"Jesus said to them: “Did you never read in the Scriptures, ‘The stone that the builders rejected, this has become the chief cornerstone. This has come from Jehovah, and it is marvelous in our eyes’? This is why I say to you, the Kingdom of God will be taken from you and be given to a nation producing its fruits."
Matthew 21:42,43