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The reason Jesus was condemned to die was that he claimed to be the Son of God. To show this, I’ll quote Luke but consider also the pertinent Scriptures in Matthew 26:63-66 and Mark 14:61-64 that record the trial of Jesus:
Luke 22:66-71 KJ2000 And as soon as it was day, the elders of the people and the chief priests and the scribes came together, and led him into their council, saying, (67) Are you the Christ? tell us. And he said unto them, If I tell you, you will not believe: (68) And if I also ask you, you will not answer me, nor let me go. (69) Hereafter shall the Son of man sit on the right hand of the power of God. (70) Then said they all, Are you then the Son of God? And he said unto them, You say that I am. (71) And they said, What need we any further witness? for we ourselves have heard of his own mouth. (emphasis mine)
Things Paul & Luke 