The final convenant bound in Jesus' crucifixion and rebirth severed the ties completely from all previous covenants. From then on, anyone who accepts Christ into themselves and follows Him could potentially attain salvation. It's no longer by blood or lineage, which makes no sense for a religion, aside from promoting ethnic tribalism. Judaism also changed in the few centuries afterwards, compiling the Talmud long after His resurrection, hence it's not the religion of Jesus' time either.

Christians should have absolutely nothing to do with the current-era jews, regardless if numerous tenets of the faith were borrowed from the Judaism of the time. The Pope is just continuing his corruption and undermining of the Church... but this has been known for a while now. (Personally I don't believe a Church is required for faith, but it has served well for cultural cohesion)