Commentaries:
Robertson's Word Pictures (NT)
Because they feared the Jews (oti efobounto touv Ioudaiouv). Imperfect middle, a continuing fear and not without reason. See already the whispers about Jesus because of fear of the Jews (John 7:13).
Had agreed already (hdh suneteqeinto). Past perfect middle of suntiqhmi, to put together, to form a compact (John 7:32, John 7:47-49).
If any man should confess him to be Christ (ean tiv auton omologhsh Xriston). Condition of third class with ean and first aorist active subjunctive of omologew and predicate accusative Xriston. Jesus had made confession of himself before men the test of discipleship and denial the disproof (Matthew 10:32; Luke 12:8). We know that many of the rulers nominally believed on Jesus (John 12:42) and yet "did not confess him because of the Pharisees" (alla dia touv Farisaiouv oux wmologoun), for the very reason given here, "that they might not be put out of the synagogue" (ina mh aposunagwgoi genwntai). Small wonder then that here the parents cowered a bit.
That he should be put out of the synagogue (ina aposunagwgov genhtai). Sub-final use of ina with second aorist middle subjunctive of ginomai. Aposunagwgov (apo and sunagwgh) is found in N.T. only here and John 12:42; John 16:2. A purely Jewish word naturally. There were three kinds of excommunication (for thirty days, for thirty more, indefinitely).
Other Robertson's Word Pictures (NT) entries containing John 9:22:
Luke 22:5
John 9:34
John 12:42
John 16:2
Acts 23:20
1 John 4:2
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