Yeah, religious ideology is tolerable for those who possess a firm grasp on reality, so playing the make-believe game of imagining a supernatural dimension is OK for many individuals, since they are able to maintain a sense of themselves.
However, for those struggling with mental illnesses of various types, it's just too much, and those "fire and brimstone" accounts of Armageddon takes on a much-more threatening and menacing tone for them vs normals, being a toxic poison for their minds that triggers anxiety disorders, psychotic breaks, etc. Of course, the WT actually seeks these types of personalities out, thinking they offer the ANSWER to all that cures the troubles of the World: prayer, Bible study, and field service. They offer the mental-health equivalent of an 1890's patent medicine cure-all.
Then if their "treatment" fails, oh, well: call 911 to have paramedics load up the body of their "oh, well, we tried" treatment failures into a body bag. Shockingly, we allow this kind of nonsense to continue in 2013, based on ancient superstitious beliefs being protected under freedom of religious worship with NO reasonable safeguards in place.
Of course, the anti-apostate talk is ramping up the volatility, since those struggling with doubts will see no other way out but eternal death; it becomes a self-correcting problem for the Society in their minds, if they can get some of those harboring apostate thoughts to eliminate themselves.
Adam