Let me get this straight. The Jews denied the Messiah, Jesus Christ. They hang onto the Old Law and customs, even though they were just a shadow of what came into being through Christ. And yet, there is an earthly kingdom coming, which is exactly what the Jews are expecting and waiting for, and they will be able to enjoy it along with Christians? That makes absolutely no sense. You are saying that those who deny Christ and those who accept Him are on even ground, and that is totally against the teaching of Scripture.
You were perfect up until the last sentence. God still has a plan for the Jews, and it involves the fulfillment of the promises in the OT to David, through Daniel, and the other prophets. So its not that Jews will be able to enjoy something with Christians, but rather we as Christians will be able to enjoy something God has promised the Jews.
Now, concerning the last sentence. No, non one who denies or rejects Christ will be part of the coming kingdom. But the nation of Israel will return (in the future) to God as a result of the events in the book of Revelation. One of Gods main purposes for those 7 years is to bring the Jews to repentance through the terrible events that will take place. The Jews that have lived and died since Christ, and who have rejected Christ ... are lost, just as anyone else since the time of Christ.
That the repentance of the Jews will take place in the future is foretold by Paul in Romans 11. Please read that chapter very carefully. You will understand. Especially when you read all the way down to verse 25 and 26.
What does it say ? ... It says that all of Israel will be saved ... Does that mean that those Jews who have already died rejecting Christ are saved ... NO ! ...
It means that sometime in the future, the entire nation of Israel will receive Christ. When will that happen? ...
I think it happens at the moment of the second coming of Christ ... Matt 24 talks about Christ coming in the clouds of heaven (just like in Daniel 7!) and that all the tribes of the earth shall mourn. Why will the tribes (and tribes refers to Israel) mourn? Because they will look upon him whom they have peirced and realize that He is and has always been their expected Messiah. Have you ever seen a Jew mourn? It will make any conversion we have experienced seem like Romper Room. The entire nation of Israel saved at that moment.
Now you see how we are enjoying the benefits of the Jews rejection, but when they finally receive Christ, it will be even better. Then we as Christians will enjoy the kingdom with them as His bride. The church will still enjoy a special relationship as His bride, but we will also share in the coming earthly eternal kingdom in which Christ will rule.