“Christians are “grafted on” to those Jews who, hearing the gospels, formed the early church (Romans 11). America* having been founded on Christian principles, is a part of the metaphysical meaning of “Israel” (*in these days, “America” is the majority in this nation who remain Christian and constitutionally “Under God”, yet are increasingly at the mercy of the tyrannical secular/fascist state.)”
Replacement theology is about as unscriptural as it gets. There is a very clear distinction between the promises of the God to Israel and those to the church and if you can’t tell that difference then you are either ignorant of scripture or intentionally twisting scripture to meet your preconceived notions of what you feel “should be” rather than what God’s word is actually saying.
Must be nice up there on your mountaintop of spiritual perfection. Lotsa luck with your conversions, there, pal.