Metatron, I don't quite agree that paradise would drive Witnesses insane, for the simple reason that they are already insane. I do agree that paradise could make things worse for most Witnesses and so exacerbate a preexisting pathology. Here's why:
As a Witness, there is little if any resting in the reality of the present moment. Rather, they are continually reaching past the actuality of here and now, out into a distant fantasy of paradise in some other time. This is a form of mental escapism that can be so deeply ingrained that people can live their entire lives mentally moving back and forth between abstract memories of the past and fantasies of the future without ever really experiencing the reality and depths of the present moment.
A Witness doesnt even know they're presently lost in delusional patterns of insanity -- nor do most other people -- so if they did happen to step into paradise it would not be long before a deep unease set in. Their entire identity before was based on focus of a time and place unreal, and a paradise real does not support or give comfort to an identity based on fantasy. So paradise could come to seem like a valley of death threatening my life and wellbeing. Never satisfied with what IS, we reach into make-believe and set up home.
For most people the moment is only something to get past. Real paradise is not about reaching or getting past, but rather meeting with the bottomless richness and depths of nature and beingness in this moment. Paradise is not so much a place, as it is simply being acutely aware of life here and now.
j