@Stephen long story short - there had been some heated debates here on this forum when things were more "unified," which led to feelings between particular individuals never being resolved. BN was then born, perhaps as an attempt to form a place where a few of these individuals held more sway. Some members went there, some stayed here, some were involved with both and some eventually came back here after coming to their own conclusions, whatever those may be.
The other part of the story, the one so eloquently summarized in the picture you included in your post, is the impulse to publicly display the earlier stated "feelings." While some of us can, for the most part, keep things civil and respect each others rights, others resort to a more outward displays of emotion by publicly doxing those they have opposition to. I'll leave the motives behind such acts to the readers imagination.