Respect the Lord’s servants. Leave behind strife and anger. Arguing is not the Lord’s way (2 Timothy 2:14, Titus 2:1-9,3:9-10; James 5:9; 1 Peter 3:8-12). There is too much fighting in the church and brethren go so far as to call each other devils and the like. But anyone who comes in the Name of Jesus Christ should be respected. Do not call each other devils or claim others are of the enemy. You risk blaspheming the Holy Spirit, a sin God does not forgive, even though Christ’s blood atones all sin (Matthew 12:24-32; Mark 3:22-30; Luke 11:15,12:10; 1 John 1:7).
How do you know someone is not acting and speaking by the Spirit? You may simply not understand things, just as the Jews did not understand Jesus or His servants. There is much the church disagrees on, but we must exercise discipline and respect for each other. Do not assume you or the church knows everything correctly, but be willing to give up erroneous viewpoints and examine things very, very closely (1 Thessalonians 5:19-21).