As ThomasCovenant pointed out with his two parallel references, the society STARTS by defining apostasy as "a rebellion against Jehovah."
So far so good, that could be backed up scripturally. The next statement is cleverly slippery but still could be ok assuming that the accused "apostate" is actually lying. More often than not, it is character assassination by implication and innuendo:
"Some apostates profess to know and serve God, but they reject teachings or requirements set out in his Word."
And of course the "in his Word" part is problematic because that assumes the accuracy of the interpretation of whatever scriptural point is supposedly violated.
But what we REALLY need to be aware of this next statement:
"Others claim to believe the Bible, but they reject Jehovah's organization and actively try to hinder its work."
Ah, now they have equated "The Organization" with Jehovah! Here is the real problem with the WTBTS's definition of "apostasy". As THEY have defined it, merely disagreeing with them is tantamount to "apostasy". He who defines the terms wins the game! They of course presumptuously call it "Jehovah's organization". Notice that they even add the kicker about alleging that apostates " actively try to hinder [their] work." Whether it's true or not is unimportant. Once one is branded an apostate, facts are no longer an issue. And since no sincere--but also sincerely mis-guided--JW would ever inquire of an "apostate" to find out if the accusations are true or valid, the accusations stand unchallenged. Again, He who defines the terms wins the game/battle/debate!
Now that the ever-venerable WTBTS has branded the woeful individual as an "apostate" they issue the coup-de-grace just to be sure:
When they deliberately choose such badness after knowing what is right, when the bad becomes so ingrained that it is an inseparable part of their makeup, then a Christian [READ: Faithful JW] must hate (in the Biblical sense of the word) those who have inseparably attached themselves to the badness. True Christians share Jehovah's feelings toward such apostates; they are not curious about apostate ideas. On the contrary, they "feel a loathing" toward those who have made themselves God's enemies, but they leave it to Jehovah to execute vengeance."
Are you feeling the love, the forgiveness or the compassion of the Christ anywhere here? I'm not.
What a sick bunch of f*cks!