JESUS IS THE SON OF GOD - REVEALED BY JESUS HIMSELF!!
The Parable of the Tenants
In Matthew 21, Jesus said:
Listen to another parable: There was a landowner who planted a vineyard. He put a wall around it, dug a wine press in it, and built a watchtower. Then he rented the vineyard to some farmers and moved to another place. When the harvest time approached, he sent his servants to the tenants to collect his fruit.
The tenants seized his servants; they beat one, killed another, and stoned a third. Then he sent other servants to them, more than the first time, and the tenants treated them the same way. Last of all, he sent his son to them. ‘They will respect my son,’ he said.
But when the tenants saw the son, they said to each other, ‘This is the heir. Come, let’s kill him and take his inheritance.’ So they took him and threw him out of the vineyard and killed him.

The Parable of the Tenants
“Therefore, when the owner of the vineyard comes, what will he do to those tenants?”
“He will bring those wretches to a wretched end,” they replied, “and he will rent the vineyard to other tenants, who will give him his share of the crop at harvest time.”
Jesus said to them, “Have you never read in the Scriptures:
The stone the builders rejected
has become the cornerstone;
the Lord has done this,
and it is marvelous in our eyes?
Therefore, I tell you that the kingdom of God will be taken away from you and given to a people who will produce its fruit. Anyone who falls on this stone w“ill be broken to pieces; anyone on whom it falls will be crushed

Jesus is the Son of God
When the chief priests and the Pharisees heard Jesus’ parables, they knew he was talking about them. They looked for a way to arrest him, but they were afraid of the crowd because the people held that he was a prophet.
Note 1: Jesus taught people through parables to make it simple and understandable for them by relating it to their daily lives. The above parable is very simple for people to understand. The Pharisees and the teachers of law understood that Jesus was talking about them, but instead of falling at his feet or understanding what He says, they are planning to kill Him. They plan to kill him because their religious teachers believe that their religion and its laws are supreme.
Their religion has become their God, which is idolatry, and hence they are repeatedly rejecting the real God. They are blinded by the devil, and they cannot understand that the messiah mentioned in their scriptures is among them and talking to them, instead, they are planning to kill him. They have become the slaves of their religion and hence failed to see the real God. Adamant faith in a religion does not ensure righteousness or doesn't ensure salvation. As in the story above, it only made them murderers and idolaters.
These are the same Jews whom God has chosen and referred to as "The apple of my eyes" and the people whom He brought out of slavery in Egypt and taught by Himself through miracle after miracle that He is the real God and there should not be any other God. Instead of understanding and following God, they are following a religious dogma. They have become so adamant that even now, after thousands of years, they are still blind and are not ready to accept Jesus as the savior mentioned in their scriptures. That is the reason God is punishing them by allowing other countries (gentiles) to threaten their very existence.
“‘The stone the builders rejected
has become the cornerstone"
But God still loves them and keeps His promise, because they are lucky to be the chosen people, for Jesus descended from them. They will become a blessing to the whole of humanity because the Savior descended from them. He will never forsake them, even though they have rejected Jesus as the Messiah. God will bless those who bless them and will curse those who curse them. The world does not know this promise of God, or they do not want to accept His promises by turning a blind eye to His promises. God will keep His promises to them exactly the way He kept His promises to Abraham's two children, Isaac and Ishmael, even today. But because of their adamant nature, God said, "What belongs to the children will be thrown to the dogs". Hence, we all gentiles (non-Jews) also got an opportunity to be called "The children of the Highest God". So through Jesus, the whole world got the opportunity to be restored from our "fallen state". If we believe in Jesus, we are no more a fallen man. The world will become one under Jesus. He will become a good shepherd. Then God's Kingdom will come on Earth. This is God's plan to save and restore humanity from the fallen state due to what Satan did to Adam and Eve to destroy God's creation.
If we believe in God and His Son Jesus - All the Pains we go through will turn to be blessings, All the Injustices will turn to our advantage, All those who died will come alive, All the lost children of God will be saved, All that we lost will be restored and there will be no reason for us to be worried or disappointed about anything in life. God never leaves us astray, instead, it is we who go astray from Him. He is close to anybody who seeks Him and trusts Him. God is not interested in our religion, our wealth, or our success, and He is not interested in our sins either, rather He is interested in us. God looks at us and not at our iniquities. He promised us all these virtues and blessings if we put our trust in Jesus. When we trust Jesus, we trust the one who sent Him. Jesus is the rejected stone that turned out to be the cornerstone. He is the cornerstone of our faith and belief. Jesus is sitting on the throne on the right side of His father now. He will come back with all the angels, in the full power and glory bestowed upon Him by His Father, to judge the world and to destroy Satan and his power along with all the people who belong to him. Our salvation is in Jesus and in His mercy, we just need to profess our trust and faith in Him with our words, our religion is immaterial to Him.
Note 2: What does the above parable convey to us about the first coming of Jesus? It says God sent His servants (messengers/prophets) to collect His fruit, but they all were being tortured or killed. At last, He sent His own Son, thinking that the tenants (mankind are like tenants in this world) would respect Him, but they killed Him as well to grab the inheritance that belonged to His Son (that shows Jesus got this world as an inheritance from His Father). Jesus said this parable by Himself! Does it show that God sent Jesus to this world to be crucified, killed, or sacrificed? That was not the original intention of God (Jesus was sent to collect the fruit from the tenants, that belonged to His Father in Heaven), but His crucifixion and killing were the consequence of the evil intentions and sinful nature of those who saw Jesus as a threat or hindrance to their evil objectives. However, God used it for the good of mankind, so that through His sacrifice humanity can be saved, but only those who trust in His Son and His authority. (It was the same as the objective of God in creating Adam and Eve was not to be fallen people, but that was the consequence of the misuse of their Free Will that they were endowed with).
God can see into the future, so He might have been well aware of the fate of His Son and all the consequences, but the consequences are not a hindrance to God's dreams for His people. However, there is a consequence for mankind as to how they use the Free Will that God endowed them with. God and His Son Jesus are the owners of this world, we are like tenants who live here for a temporary period. But God gives us a chance to be eternal part-takers in His eternal Kingdom, provided we believe in Him and in His Son, who has inherited this world.