Some people have the attitude that varying teachings on the last days and Christ’s return is not a fellowship issue. I disagree wholeheartedly. Hope is the anchor of the soul, Heb 6:19. When people teach error about the return of Christ, it is something that shakes people’s faith and causes people to lose hope. A perversion of the doctrine of Jesus’ return is going to rob people of hope and should not be tolerated. Hope remains because we know Jesus will return and will save the faithful and punish the evil world, 2 Peter 3:9ff. Anything that is contrary to this is faithless.
When someone perverts the Gospel, that person is going to receive the worst judgment God metes out. To rob people of God’s hope in Christ, hope being the anchor of the soul, is to shake people’s faith and cause them to give up. Read 2 Thessalonians 1:7-9.