I currently see that the Church was always part of the plan of God, so was done after israel proper rejected Jesus as messiah, so do not see it as plan B, but also do see Israel as still part of the plan pf God in the sense that to me spiritual israel would be saved Jews, and that Jesus does save a faithful remnant of them in each generation... Also take the all israel shall be saved as the generation alive at time of Second Coming...Are we currently in God's parenthesis, ending with the rapture of the church?