and, the sin needs to be repented of, for those in the body of Christ. (obviously, those outside of Christ do not repent).
this includes repentance for divorce. and even moreso(and maybe much much harder) repentance for marrying someone who was divorced or repentance for getting married again when the first spouse is still alive. but the repentance has to be real, not put on. and no church in the world will help with this.... except the few places where they are abiding in Him daily, doing His Will, just like the disciples who stayed with Jesus and didn't walk away from Him.
all sin will potentially , and has greatly just in watching/observing others/churches and out of churches,
detract from fellowship with God and greatly reduces any testimony in Jesus when sin remains unrepented of.
it has been, and maybe often is, and can be a grueling process, all the harder because people in general, christians even in particular, do not practice repentance in their lives nor require it of others IN the body of Christ, so the evil stain remains in the midst of the congregation and is observable to those outside. a clean heart, a clean conscience (see Hebrews - it is WONDERFUL) before God, a clean and true testimony of Jesus, and cleansing by His BLOOD, is the way Scripture says the ekklesia OVERCOME...... .......