John 12:38

That the word of Isaiah the prophet might be fulfilled, which he spake, Lord, who hath believed our report? And to whom hath the arm of the Lord been revealed?

Might be fulfilled ... does not mean that the Pharisees disbelieved in order to fulfill prophecy, but that their unbelief had been foretold by Isaiah. The very same unbelief that greeted the words of Isaiah also greeted the message of Jesus. Barnes noted that:

Isaiah's message was despised by the nation, and he himself put to death. And it was also true, by the same causes: by the same nation, that the same gospel message was rejected by Jews in the time of Christ. The same language of the prophet fully expresses both events; and no doubt it was intended by the Holy Spirit to mark both events.[22]

Significantly, the prophecy here quoted (Isaiah 53:1) is the same prophecy that foretold the rejection of Jesus and that he would be a man of sorrows and acquainted with grief. That great chapter also details the crucifixion: "by his stripes we are healed," "God laid upon him the iniquity of us all," etc.