John 16:2

“They shall put you out of the synagogues, etc.] The Jews had made a law already, that he that confessed that Jesus was the Messiah, should be cast out of their synagogues; and they had put it in execution upon the blind man Christ restored to sight, for his profession of faith in him; which struck such a terror upon the people, that even many of the chief rulers who believed that Jesus was the true Messiah, durst not confess him, because of this law; for it was what they could not bear the thoughts of, to be deemed and treated as heretics and apostates, and the vilest of wretches: for this putting out of the synagogue, was not the lesser excommunication, which was called ywdn “Niddui”, and…”

“They shall put you out of the synagogue-- (Joh 9:22; Joh 12:42). the time cometh, that whosoever killeth you will think that he doeth God service--The words mean religious service--"that he is offering a service to God." (So Saul of Tarsus, Gal 1:13-14; Phi 3:6).”

“Out of the synagogues - See the notes at John 9:22. They would excommunicate them from their religious assemblies. This was often done. Compare Acts 6:13-14; Acts 9:23-24; Acts 17:5; Acts 21:27-31. Whosoever killeth you - This refers principally to the Jews. It is also true of the Gentiles, that in their persecution of Christians they supposed they were rendering acceptable service to their gods. God’s service - The Jews who persecuted the apostles regarded them as blasphemers, and as seeking to overthrow the temple service, and the system of religion which God had established. Thus, they supposed they were rendering service to God in putting. them to death, Acts 6:13-14; Acts 21:28-31.…”

“The time cometh, that whosoever killeth you will think he doth God service - But, blessed be God, the time is so far past, that those who bear the name of Christ do not now generally suppose they do him service by killing each other for a difference in opinion or mode of worship. John 16:3”

“shall: Joh 9:22, Joh 9:34, Joh 12:42; Luk 6:22; Co1 4:13 the time: Isa 65:5; Mat 10:28, Mat 24:9; Act 5:33, Act 6:13, Act 6:14, Act 7:56-60, Act 8:1-3, Act 9:1, Act 9:2; Act 22:3, Act 22:4, Act 22:19-23, Act 26:9-11; Rom 10:2, Rom 10:3; Gal 1:13, Gal 1:14; Phi 3:6 John 16:3”