It was beginning of the fulfillment of Christ's words:
16 And 
other sheep I have, which are not of this fold: 
them also I must bring, and they shall hear my voice: and they shall become one flock, one shepherd.  Jn 10
It was the creation of a NEW CREATURE, 'The Israel of God':
15 For
 neither is circumcision anything, nor uncircumcision, but a new creature.
16 And as many as shall walk by this rule, peace 
be upon them, and mercy, and upon
 the Israel of God.  Gal 6
It was the making of ONE NEW MAN:
13 But now in
 Christ Jesus ye who sometimes were far off are made nigh by the blood of Christ.
14 For he is our peace, who 
hath made both one, and hath broken down the middle wall of partition between us;
15 Having abolished in his flesh the enmity, even the law of commandments contained in ordinances; for to make in himself of twain 
one new man, so making peace;  Eph 2
13 For by 
one Spirit are we all baptized into
 one body, whether we be Jews or Gentiles, whether we be bond or free; and have been all made to drink into 
one Spirit.  1 Cor 12
16 And other sheep I have, which are not of this fold: them also I must bring, and they shall hear my voice; and 
there shall be one fold, and one shepherd.  Jn 10
11 Where 
there is neither Greek nor Jew, circumcision nor uncircumcision, Barbarian, Scythian, bond nor free: but Christ is all, and in all.  Col 3
28 There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for 
ye are all one in Christ Jesus.  Gal 3
12 And the Spirit bade me go with them, 
nothing doubting. Moreover these six brethren accompanied me, and we entered into the man's house:  Acts 11
22 Even the righteousness of God which is by faith of Jesus Christ unto all and upon all them that believe: for 
there is no difference:  Ro 3
9 And put
 no difference between us and them, purifying their hearts by faith.  Acts 15
12 For there is 
no difference between the Jew and the Greek: for the same Lord over all is rich unto all that call upon him.  Ro 10
Put that in your Dispensationalist pipe and smoke it.