“These words spake his parents, because they feared the Jews: for the Jews had agreed already, that if any man did confess that he was Christ, he should be put out of the synagogue.”
King James Version (KJV)
9:22 He should be put out of the synagogue - That is be excommunicated.
Joh 9:22 Because they feared the Jews. The rulers. They knew that it was agreed to excommunicate any one who confessed Christ. Hence they said, He was born blind, he now sees, you must ask him how he was cured. He is of age. To be cast out of the synagogue was an awful punishment to a Jew. It put him on a level with the heathen.