The kingdom was at hand during His preaching. Entry into the kingdom came at Pentecost.
(Col 1:13 Who hath delivered us from the power of darkness, and hath translated us into the kingdom of his dear Son)
I'll guess you are going to argue that the Son's kingdom is not the kingdom He preached while alive.
I had seek a clarification from you, which you have avoid answering so far:
Does one need to understand that Jesus had to die and rise again, in order to believe Jesus is the Son of God (John 20:31)?
The answer cannot be a yes, because the record in Matthew 16 gave us an example of Peter believing the latter, without the former.
13 When Jesus came into the coasts of Caesarea Philippi, he asked his disciples, saying, Whom do men say that I the Son of man am?
14 And they said, Some say that thou art John the Baptist: some, Elias; and others, Jeremias, or one of the prophets.
15
He saith unto them, But whom say ye that I am?
16 And Simon Peter answered and said, Thou art the Christ, the Son of the living God.
17 And Jesus answered and said unto him, Blessed art thou, Simon Barjona: for flesh and blood hath not revealed it unto thee, but my Father which is in heaven.
followed by
21 From that time forth began Jesus to shew unto his disciples, how that he must go unto Jerusalem, and suffer many things of the elders and chief priests and scribes, and be killed, and be raised again the third day.
22
Then Peter took him, and began to rebuke him, saying, Be it far from thee, Lord: this shall not be unto thee.
23 But he turned, and said unto Peter, Get thee behind me, Satan: thou art an offence unto me: for thou savourest not the things that be of God, but those that be of men.
Do you agree with what the Scripture tells us here?