1 John 2:2
1 John 2:22He Himself is the atoning sacrifice for our sins, and not only for ours but also for the sins of the whole world.
JWs acknowledge that Jesus' sacrifice covers "the whole world" but interpret this through the two-class framework: the anointed 144,000 have Jesus as their direct mediator, while the "great crowd" benefit only indirectly through the organisation. The ransom is understood as a corresponding ransom — an exact human equivalent for Adam's perfect life — not as a sacrifice of infinite, more-than-human worth.
First says Jesus is the propitiation "not for our sins only but also for those of the whole world." If Jesus' sacrifice covers the whole world, his mediation cannot be restricted to 144,000. The Watchtower's corresponding-ransom doctrine requires mathematical equivalence — one perfect human life for one perfect human life — but Paul's argument in explicitly says "the gift is not like the trespass": the gift exceeds the debt. Hebrews confirms the point: exact-equivalence sacrifices (the OT system) failed repeatedly; Christ's one-for-all-time sacrifice succeeded precisely because of infinite worth (, 10:11-14). One human life covering billions of sinners across all of history requires a sacrifice of more-than-human value — which is exactly what the deity of Christ provides.