A lot of Christians do not understand that Jesus is God. The trinity is: God the Father, God the Son and God the Holy Spirit, all one perfect God. "This is he that came by water and blood, even Jesus Christ; not by water only, but by water and blood. And it is the Spirit that beareth witness, because the Spirit is truth. (7) For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one." (1 John 6-7:) Jesus spoke in parables so that those who believed in the gospel would understand it and those who didn't believe wouldn't understand. "And the disciples came, and said unto him, Why speakest thou unto them in parables? (11) He answered and said unto them, Because it is given unto you to know the mysteries of the kingdom of heaven, but to them it is not given. (12) For whosoever hath, to him shall be given, and he shall have more abundance: but whosoever hath not, from him shall be taken away even that he hath. (13) Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand." (Matthew 13:10-13). God has a plan for the church and in his plan it is up to us to understand that Jesus is the God and Savior. Jesus died on the cross for the sins of humanity and was in perfect control in doing so.
"I and the Father are one." (John 10:30). If Jesus is saying that He and the Father are one, then He is also saying that He is God. "Jesus said unto them, Verily, verily, I say unto you, Before Abraham was, I am."(John 8:58 ). "In the beginning was the Word, and the Word was with God, and the Word was God." (John 1:1). “And the Word was made flesh, and dwelt among us” (John 1:14). If Jesus was before Abraham, then we should understand that when Jesus came in the flesh he had already existed. He was born into the earth through a woman but was in total control even in the flesh. "Behold, a virgin shall be with child, and shall bring forth a son, and they shall call his name Emmanuel, which being interpreted is, God with us."(Matthew 1:23). "For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counseller, The mighty God, The everlasting Father, The Prince of Peace."(Isaiah 9:6). The coming of the Messiah was the coming of "The mighty God." It was foretold throughout the old testament and fulfilled in the new testament. "Jesus saith unto him, Have I been so long time with you, and yet hast thou not known me, Philip? he that hath seen me hath seen the Father; and how sayest thou [then], Shew us the Father?" (John 14:9). Jesus tells philip that he is God, because in seeing Jesus he was looking at God as well. "Believest thou not that I am in the Father, and the Father in me? the words that I speak unto you I speak not of myself: but the Father that dwelleth in me, he doeth the works."(John 14:10). “You are My witnesses,” says the Lord, “And My servant whom I have chosen, That you may know and believe Me, and understand that I Am He. Before Me there was no God formed, Nor shall there be after Me. I, even I, am the Lord, and besides Me there is no Savior.” (Isaiah 43:10-11). In the verses above, God is telling us that when the savior comes (Jesus) witness that God is He. God and Jesus are one in the same, and there is no God before Jesus. “Therefore I said to you that you will die in your sins; for if you do not believe that I AM He, you will die in your sins.”(John 8:24). If one takes a close look at the verbiage, it would be easy for one to realize that God and Jesus both state "I AM HE". "looking for the blessed hope and glorious appearing of our grea"looking for the blessed hope and glorious appearing of our great God and Savior Jesus Christ." (Titus 2:13). Titus recognizes that God and Jesus are one. “I AM the Alpha and the Omega, the Beginning and the End, the First and the Last.”(Revelation 22:13). Jesus wants us to know that He is the first and last God/Jesus are one. No one came before Jesus and No one will come after Jesus because Jesus is God! "Then saith he to Thomas, Reach hither thy finger, and behold my hands; and reach hither thy hand, and thrust it into my side: and be not faithless, but believing. (28) And Thomas answered and said unto him, My LORD and my God." (John 20:27-28).
The people who knew Jesus believed that he was God; furthermore, the Jews who persecuted Jesus, did so because they understood that Jesus was claiming to be God.