Acts 15:21, Acts 3:14-17, Lk 23:35-37
The Jews read the Old Testament in the synagogue every Sabbath. (Acts 15:21)
Acts 15:21 For Moses of old time hath in every city them that preach him, being read in the synagogues every sabbath day.
But the Jews did not know that the words of the prophets had been fulfilled in Jesus. That is, they did not know that Jesus was the Christ prophesied in the Old Testament. So the Jews killed Jesus. ( Acts 3:14-17, Acts 13:27, Lk 23:35-37)
Acts 3:14 But ye denied the Holy One and the Just, and desired a murderer to be granted unto you; 15 And killed the Prince of life, whom God hath raised from the dead; whereof we are witnesses. 16 And his name through faith in his name hath made this man strong, whom ye see and know: yea, the faith which is by him hath given him this perfect soundness in the presence of you all. 17 And now, brethren, I wot that through ignorance ye did it, as did also your rulers.
Acts 13:27 For they that dwell at Jerusalem, and their rulers, because they knew him not, nor yet the voices of the prophets which are read every sabbath day, they have fulfilled them in condemning him.
Lk 23:35 And the people stood beholding. And the rulers also with them derided him, saying, He saved others; let him save himself, if he be Christ, the chosen of God. 36 And the soldiers also mocked him, coming to him, and offering him vinegar, 37 And saying, If thou be the king of the Jews, save thyself.