This point was one of several milestones that led to my leaving the Watch Tower religion. The Society in the Watchtower magazine had published its rules to 'hate' apostates the same way as King David 'hated' the enemies of Jehovah.
However, Jesus Christ overturned this provision and gave a new commandment at Matt 5:43-46, "You have heard that it was said, 'You shalL love your neighbor, and hate your enemy:' but I say unto you, love your enemies, and pray for them that persecute you; that you may be sons of your Father who is in heaven: for he makes his sun to rise on the evil and the good, and sends rain on the just and the unjust. For if you love them that love you, what reward have you? do not even the publicans do the same?"
In Israel, when a Rabbi (which Jesus was called) says, "but I say to you" the Rabbi is essentially overturning a previous rule or teaching. So, the WTS is completely wrong, and they demonstrate their selfish approach to Scripture for the benefit of organizational policy over and above concern for truth and people. - Amazing