Robinson was correct when he quoted the teachings of Paul in his letter to the Corinthians, but he was wrong by not obeying other parts of the next letter to the Corinthians .
2 Corinthians 6:14 Do not be bound together with unbelievers ; for what partnership have righteousness and lawlessness, or what fellowship has light with darkness ? 15 Or what harmony has Christ with Belial, or what has a believer in common with an unbeliever ? He never should have tied himself to this organization of unbelievers in the first place.