Help the elders discern between one who is a trouble-making apostate and a Christian who becomes weak in faith and has doubts. (2 Peter 2; Jude 22, 23) The former one should be dealt with decisively after extended efforts put forth to readjust him. (2 John 7-10) On the other hand, one weak should be patiently and lovingly assisted to get the accurate knowledge solidify his faith.
So if someone "has doubts" they should be "patiently assisted".But what if they cannot overcome their doubts? Then they're branded as traitors! if a baptized Christian abandons the teachings of Jehovah, as presented by the faithful and discreet slave, and persists in believing other doctrine despite Scriptural reproof, then he is apostatizing.
They cannot be left alone, no, they must be shunned and reviled!
The faithful and discreet slave is your master! Bow down!