The Watchtower teaches that JW's must hate 'wrong doers' who disagree with Watchtower doctrines and that 'godly hate' is necessary to please God.
Notice the following Watchtower quote about hating 'anyone sending forth contentions among brothers', i.e. hating JW's and outsiders who publicly question, disagree, or challenge current Watchtower viewpoints. 
Also notice that anyone who disagrees with the Watchtower (sends forth contentions or disagreements 'among brothers') is a 'wrong doer' deserving of 'Godly hate'.
Here's what they say. 'You have seen the benefit of godly love, but do you know how to hate? ... These very strong words are an expression of godly hate, and you too must have this quality to be pleasing to God. Hate causes a feeling of disgust to well up inside you. You loathe, abhor, despise the object of your hatred. The very thought of it makes you recoil. ... godly hate will separate you from wrongdoing. ... There are six things that Jehovah does hate, ... anyone sending forth contentions among brothers. ... Godly hatred never has as its object our Christian brothers, no matter how imperfect.' Watchtower Magazine, July 15, 1974, Article: 'The Godly Qualities of Love and Hate', page 442, par 17-20
1. JW's believe apostates have left 'God's organization' and are now part of 'Satan's organization'. Their world is black and white. It's either the Watchtower or Satan. There are only two choices
2. Jehovah's 'Theocratic' organization refers to a form of government that is ruled by God through His 'representatives'. To learn more, do a Google search using keywords such as these. Theocracy, ... theocratic government, ... Islam, ... theocracy human rights, ... etc.
3. 'The further a society drifts from the truth, the more they will hate those that speak it.' George Orwell
4. The Watchtower hides the important truth from Jehovah's Witnesses. JW's are led to believe that all 'apostates' are evil, immoral, and guilty of 'gross sins'. 1 Cor 6:10; However this is not true. The truth can be found in the Watchtower's secret rule book Shepherd the Flock of God, that is available to Elders and higher ranking officials.