You don't think Cornelius was born again? Really? Well let me ask you one question: how was it that he feared God? Paul said in Romans 3, speaking of the natural of man, "there is no fear of God before their eyes." Here's a man that fears God, he gives much alms to the people, he prays to God consistently, etc. You think he is an unregenerate man? You really don't understand the depravity of man and the depth of change that regeneration brings upon a person.
No, I don't think Cornelius was saved.
As I said before, I do believe the Holy Spirit worked in the lives of men before the Cross, but, I do not believe that men were born again before the Cross.
The sending of the Holy Spirit marks a clear line in history, and in the salvation of men.
Cornelius, I would presume, was a believer long before the Angel directs him to Peter, and lets look at that:
Acts 10
44While Peter yet spake these words, the Holy Ghost fell on all them which heard the word.
45And they of the circumcision which believed were astonished, as many as came with Peter, because that on the Gentiles also was poured out the gift of the Holy Ghost.
This takes place after Peter preaches the word.
Now hear Peter's words in defense of "going in unto Gentiles:"
Acts 11
11And, behold, immediately there were three men already come unto the house where I was, sent from Caesarea unto me.
12And the Spirit bade me go with them, nothing doubting. Moreover these six brethren accompanied me, and we entered into the man's house:
13And he shewed us how he had seen an angel in his house, which stood and said unto him, Send men to Joppa, and call for Simon, whose surname is Peter;
14Who shall tell thee words, whereby thou and all thy house shall be saved.
15And as I began to speak, the Holy Ghost fell on them, as on us at the beginning.
16Then remembered I the word of the Lord, how that he said, John indeed baptized with water; but ye shall be baptized with the Holy Ghost.
17Forasmuch then as God gave them the like gift as he did unto us, who believed on the Lord Jesus Christ; what was I, that I could withstand God?
18When they heard these things, they held their peace, and glorified God, saying, Then hath God also to the Gentiles granted repentance unto life.
How then do you say he (Cornelius) was born again?
When until this time, he had not the Spirit of God?
Here's another thing: the angel sent to Cornelius said that his prayers and alms had come up before God for a memorial. My question is, a memorial of what? A memorial is intended to bring to mind a certain event. What is Cornelius' alms and prayers bringing to mind to God? According to you, the answer is nothing. Nothing has happened to this guy yet. The only logical answer is that his alms and prayers are a memorial of God changing his heart in regeneration.
A memorial of his prayers and alms.
God had changed his heart, as He did for any who were in relationship with Him.
But I see a distinct difference between the Spirit of God coming upon the believers before the Cross, and believers receiving the permanent indwelling whereby we are sealed.
Finally, Peter, upon entering the place where the gentiles were gathered to hear him preach and upon hearing the story of Cornelius, he states, "Of a truth I perceive that God is no respecter of persons: but in every natin he that feareth him, and worketh righteousness, is accepted with him." How could Peter make that statement before he had ever preached to them? They might have rejected, and according to you none of them were regenerate. The only way he could make that statement is if he understood that God had been there before him and changed the hearts of Cornelius and the other gentiles gathered there. In short, there is proof that God has people among the gentiles as well as the jew, and this is seen by Peter before he had ever preached a single bit of the gospel to them.
That God had included Gentiles (and Samaritans) in salvation under the New Covenant was verified in the public display of the receiving of the Holy Spirit.
It would take just such examples to convince the Jews that God was no respecter of persons, and that He had granted repentance to the Gentiles.
God bless.