In scripture, Jesus did not think the religious Jews of His day, those were bent on opposing Him, had any special privilege with God. When they claimed that Abraham was their Father, Jesus said, “If you were Abraham’s children, then you would do what Abraham did. As it is, you are looking for a way to kill me, a man who has told you the truth that I heard from God. Abraham did not do such things. You are doing the works of your own father” (see John 8).
They responded “We are not illegitimate children, the only Father we have is God himself.” To which Jesus replied, “If God were your Father, you would love me, for I have come here from God. I have not come on my own; God sent me. Why is my language not clear to you? Because you are unable to hear what I say. You belong to your father, the devil, and you want to carry out your father’s desires. He was a murderer from the beginning, not holding to the truth, for there is no truth in him. When he lies, he speaks his native language, for he is a liar and the father of lies”(see John 8).
Notice that Jesus told the Jews who were actual physical descendants of Abraham, “You belong to your father, the devil.”
Jesus Continues; “And because I tell you the truth, ye believe me not. Which of you convinceth me of sin? And if I say the truth, why do ye not believe me? He that is of God heareth God’s words: ye therefore hear them not, BECAUSE YE ARE NOT OF GOD (John 8:45-47).
Abraham’s children are those who are of faith that lead to Christ and who practice righteousness. The Apostle Paul also rebuked a Jewish socerer, calling him “thou child of the devil”.
And when they had gone through the isle unto Paphos, they found a certain SORCERER, a FALSE PROPHET, a JEW, whose name was Barjesus: Which was with the deputy of the country, Sergius Paulus, a prudent man; who called for Barnabas and Saul, and desired to hear the word of God. But Elymas the sorcerer (for so is his name by interpretation) withstood them, seeking to turn away the deputy from the faith. Then Saul, (who also is called Paul,) filled with the Holy Ghost, set his eyes on him. And said, O full of all subtilty and all mischief, THOU CHILD OF THE DEVIL, thou enemy of all righteousness, wilt thou not cease to pervert the right ways of the Lord? And now, behold, the hand of the Lord is upon thee, and thou shalt be blind, not seeing the sun for a season. And immediately there fell on him a mist and a darkness; and he went about seeking some to lead him by the hand. Then the deputy, when he saw what was done, believed, being astonished at the doctrine of the Lord (Acts 13:6-12).
Later in 1 Thessalonians 2 we we the following from the words of the apostle Paul as well:
For you, brothers and sisters, became imitators of God’s churches in Judea, which are in Christ Jesus: You suffered from your own people the same things those churches suffered from the Jews who killed the Lord Jesus and the prophets and also drove us out. They displease God and are hostile to everyone in their effort to keep us from speaking to the Gentiles so that they may be saved. In this way they always heap up their sins to the limit. The wrath of God has come upon them at last.(1 Thessalonians 2:14-16)
Notice that Paul is referring to evil within Jewry. He says of these Jews, (1) the churches suffered from them (2) they killed the Lord Jesus (3) they killed the prophets (4) they drove us out (i.e. they opposed Paul’s ministry). Paul says they displease God, they are hostile to the spreading of the Gospel and because of these things they are heaping up their sins to the limit and the wrath of God has come on them at last.
Though there are many respectable Jews, and there are some who trust in Jesus as their Savior, being Jewish doesn’t mean that a person is a child of God. In fact Paul tells us in Romans that not all within Israel are truly Israel in God’s eyes because of their unbelief.
Not as though the word of God hath taken none effect. For they are not all Israel, which are of Israel: Neither, because they are the seed of Abraham, are they all children: but, In Isaac shall thy seed be called. That is, They which are the children of the flesh, these are not the children of God: but the children of the promise are counted for the seed (Romans 9:6-8).
It is those who are of faith, who believe that Jesus is the Messiah, who are the children of God.