Deuteronomy 18 gives absolute authority to only ONE
I will hold accountable whoever does not listen to My words that he speaks in My name.
(Deuteronomy 18:19)
The correct Exegesis to this passage is a condition that requires a clear indicative transition from Moses to The Prophet Jesus Christ. So that if any Israelite does not listen to Jesus the Christ will expect to be penalized severely, as the statement "I myself will require it of him".
What is required by those Israelites, when this transition happens from Moses to Jesus the Christ?
A penality from an infringement that will be delt with personally by God the Father, which implies a devastating outcome for the unbelieving Israelite.
This condition alone in having faith and obedience to the Christ/Prophet is what ties the contractual agreement from Moses who was under the old contract to Jesus who transitioned the fulfillment of the 1st contract to the new contract.
This is the conditional transitional clause from the old to the new contract that would either validate or invalidate the promises made to Abraham, because the Old cannot stand alone on its own, without the stamp of approval of the new.
This is the exist clause to any obligations made to Abraham, if the recipients when the Messiah came rejected this transition from Moses to Messiah the Prophet.
In fact the severe penalty of unbelief, as many unbelieving Jews have gone to the grave, without saying blessed is he who came in the name of the Lord is.....
Kiss his son, or he will be angry and your way will lead to your destruction, for his wrath can flare up in a moment. Blessed are all who take refuge in him (Psalm 2:12)
Jesus would ratify the condition of salvation and union with God through the validated transition from Moses to the Messiah..
Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God.
For I say unto you, Ye shall not see me henceforth, till ye shall say, Blessed [is] he that cometh in the name of the Lord. (Matthew 23:39)
To see the Lord or to have any union or contractual agreement with God, all Israelites are required to kiss the Son, otherwise they have absolutely no business with the God of Israel, infact their heavenly citizenship is revoked, where they are no longer Israel.
This is why those, whether they be Jews or Gentiles who call upon the Christ are those afforded privilleges within the heavenly citizenship of Israel as their contracts are validated through the SEED OF PROMISE Christ Jesus.
Those who say we are Abraham's lineage who do not kiss the Son, well their old contract is invalidated and they no longer can call themselves Israel.
The Church without a national flag or should I say the multicoloured Jospeh's coat is the many nations eho are oth Jews and gentiles who are now the true Israel of God.
God's Israel encompasses the sea shore as prophesied....in Romans 9:27.
Even those who have transitioned from old to new or even gentiles within God's Israel are not guaranteed salvation, unless they stay faithful even onto death.