To be clear, you’re saying that:
No, Jesus’s teaching about the Kingdom of Heaven is not relevant, applicable, to everyone, us.
If you believe you are Israel, and you are going to be a kingdom of priests to the gentile nations, then follow the gospel of the kingdom and see where it gets you in this "but now" of God's timetable. Unfortunately for you, during this "but now" time, there is neither Jew nor Greek, male nor female, bond nor free, making up the body of Christ. He is no respector of persons during this age of grace. So your belief that you are spiritual Israel is for naught. And your following the commands and commission for the Kingdom is for naught. While at the same time, you are rejecting the commission of the dispensation of grace, and the gospel of your salvation, and God's Plan for mankind at this "but now" time of His timeline. It's a lose/lose life of works for salvation, that will be judged according to Romans 2:16. You are striving to fulfill "time past" while disregarding "but now".
"For by grace are ye saved through faith; and that not of yourselves, it is the gift of God, not of works, lest any man should boast." Eph. 2:8,9.