The Jews refused to concede the logic of comparing the Old Testament’s miracles with God’s works of Christ, that were marvels. They did not believe he was a prophet or God’s sent One, otherwise their position would have been faulty and would be blameworthy.
They fell back on a fallacy, to the effect that the miracle was a delusion, and that the man had not been blind at all. They were willing to allege the impossible to decry the happening of a miracle at Jesus’ hands. To heal one born blind seems an impossibility to them, an affliction resulting from hereditary guilt.
The parents were brought around, who had heard of their son’s problems with the police. These parents spoke cautiously for fear of the Pharisees, and denied what they had earlier heard from their son. They abandoned him, so as not to be entangled in the crisis. So the son was left on his own, responsible for himself. Expulsion from the Council was a grave matter; it means separation from society like a leper. It would also mean denial of rights and the chance of marriage. Jewish hatred for Jesus had reached this extent that they wished to destroy his followers too.