Black and white races are equal - in the New Testament? To me, it's simple that black and equal races are equal. But since the recently, black people had a lower status than white people and also suffered from discrimination as everybody knows, and I'm wondering, because the Christianity exists around 2000 years, and these issues were among white Christians, so I'm wondering maybe what we think today, wasn't simply understood to people in past, therefore I'm looking for proofs/verses from the New Testament that support or oppose the idea that black and white people are equal in their rights etc.
As far as the Jews were/are concerned, the most significant difference between differing people groups in the Bible was/is the distinction between Jews and Gentiles.  All other distinctions, such as wealth, colour of skin, etc, are as nothing compared to this difference.  This was the chief difference in the Old Testament.
In the New Testament, in that Jew and Gentile are brought together as equals in the Gospel Age it follows that all other differences are also to be treated as irrelevent.
So in Ephesians we are told that the Gentiles are &quot;fellowheirs, and of the same body&quot;, (Eph 3:6).  &quot;Fellow&quot; here means &quot;equal&quot;: the Gentiles are equally heirs along with the Jews.
The Apostle continues into the next chapter, &quot;There is one body, and one Spirit, even as you are called in one hope of your calling: one Lord, one faith, one baptism, one God and Father of all, who is above all, and through all, and in you all&quot;, (Eph 4:4-6).
Seeing we all who are in Christ have &quot;one ... Father of all&quot; and &quot;one baptism&quot; it follows there is equality between all who are in Christ, irrespective of their roots.
And I am minded to add
&quot;There is neither Jew nor Greek, there is neither slave nor free, there is neither male nor female; for you are all one in Christ Jesus&quot; (Gal 3:28); and
&quot;where there is neither Greek nor Jew, circumcised nor uncircumcised, barbarian, Scythian, slave nor free, but Christ is all and in all.&quot; (Col 3:11).
Also, everyone who repents and believes in Christ &quot;puts on Christ&quot; (Romans 13:14), they put on the righteousness of Christ, like a piece of clothing.  God the Father now sees the believer as having the complete righteousness of His own Son: this righteousness, being not ours but His Son's, is the same measure of righteousness for all believers: of course it must be, because it is precisely the same righteousness, being Christ's.  All then are equally righteous.
Finally, early in John's Gospel we have our Lord speaking to two very opposite kinds of sinners:
The first is Nicodemus.  This sinner is:
A man.  A Jew.  A member of the Sanhedrin.  Reputed as very knowledgeable in the Bible that at that time existed, viz the Old Testament.  A teacher of religion. Probably rich.  Held in high regard by the Jewish people.  But all these advantages are no good to him. They will not bring him into a right standing before God, he will still spend eternity in the flames of hell unless something happens.  Jesus says he &quot;must be born again&quot; (John 3:7). He needs to be born of the Spirit of God to change him and make him a new creature.
The second is the woman of Samaria.  This sinner is:
A woman. A Gentile. A member of the Samaritan nation and religion which was despised by the Jews.  A follower of false religion.  She is poor.  She is held in low esteem even by the despised Samaritans because she is living with a man who is not her husband.  But all these disadvantages will be no hindrance to her becoming a child of God: all she needs to do is see her spiritual need and ask the right person for the living water.
The point I am wanting to make is that the opposite from the outwardly moral Nicodemus is not a black person or any other kind of person: the opposite is a person of low reputation because of her lifestyle which blatantly disregards accepted moral standards.
Despite their obvious outward differences these two sinners have precisely the same need: faith in Christ and in his taking their punishment for their sins at the cross; they both need the Holy Spirit to give them the new birth; they both need a new start in life.  The human heart is a deep well.  They do not need to tie a few apples onto the thorn bush of their souls to make them appear outwardly fruitful.  God needs to change them and us deep within our souls by giving us that living water that bursts out into a changed life.
The only important difference between people is if we are born again of the Spirit.  If we have the Spirit of Christ then we are spiritually minded and at peace with God; if we have not the Spirit then we are carnally minded and are at enmity against God,
&quot;For to be carnally minded is death; but to be spiritually minded is life and peace. Because the carnal mind is enmity against God: for it is not subject to the law of God, neither indeed can be.  So then they that are in the flesh cannot please God.  But ye are not in the flesh, but in the Spirit, if so be that the Spirit of God dwell in you. Now if any man have not the Spirit of Christ, he is none of his.&quot; (Romans 8:6-9).
There is no halfway house here: you are either born again and pleasing to God, or you have not the Spirit of Christ and are at enmity against God.  This is the only truly important difference.
Outward differences are immaterial.  The human heart is the same the world over.
Faith in Christ, being born again, is the only difference that really counts.