Romans 6:3
Romans 6:33Or aren’t you aware that all of us who were baptized into Christ Jesus were baptized into His death?
JWs accept that baptism unites the candidate with Christ's death symbolically — a public declaration of personal dedication to Jehovah. From 1985 onward, the second baptism question further identifies the candidate as one of Jehovah's Witnesses "in association with God's spirit-directed organisation" (revised in 2019 to "in association with Jehovah's organisation"), making the vow a dual identification: with Jehovah AND with the organisational arrangement.
Paul's preposition is load-bearing: baptised INTO Christ Jesus, baptised INTO his death. The candidate is being united with a person, not enrolled in a corporation. The NWT itself reads "baptised into Christ Jesus" — even on the JW translation, the union is with Christ. says the same: "as many as were baptised into Christ have put on Christ". — Peter's Pentecost sermon — commands baptism "in the name of Jesus Christ for the forgiveness of sins". — the Ethiopian eunuch — has one baptism question, about faith in Christ. None of the apostolic baptism texts name an organisation, and the NWT does not insert one. The 1985 second question added a vow the apostles never required, and that vow is the lever the shunning system uses.