The man's parents said this because they were afraid of their leaders. The leaders had already agreed that no one was to have anything to do with anyone who said Jesus was the Messiah.
Joseph from Arimathea was one of Jesus' disciples. He had kept it secret though, because he was afraid of the Jewish leaders. But now he asked Pilate to let him have Jesus' body. Pilate gave him permission, and Joseph took it down from the cross.
The disciples were afraid of the Jewish leaders, and on the evening of that same Sunday they locked themselves in a room. Suddenly, Jesus appeared in the middle of the group. He greeted them
I know you live where Satan has his throne. But you have kept true to my name. Right there where Satan lives, my faithful witness Antipas was taken from you and put to death. Even then you did not give up your faith in me.
The leaders told the man, “You have been a sinner since the day you were born! Do you think you can teach us anything?” Then they said, “You can never come back into any of our synagogues!”