As best as I can work out, the thinking goes that NC wanted to frame BC for domestic violence. She enlisted the help of some friends or a friend to help her either be hurt or appear hurt. Somewhere in the staging of this fake DV, something went wrong and she was killed. Her accomplice then dumped her body.
This is a most convenient theory for the faction of folks out there who either don't believe that domestic violence exists, or if it does, women are most often the perpetrators of it. (A quick google search on men's rights or father's rights groups will point you in the direction of these people and you can get your fill of their skewed statistics, their downright denial of reality, and their poisonous disdain for women in general). In this scenario, not only is NC manipulative and dishonest, she has also managed to frame her own husband for her murder before she's even dead, and in the process has become responsible for her own death. In this scenario, conveniently, BC is absolved of every single responsibility, ever bit of accountability, and metamorphosizes in one day - July 12 - into a martyr, an every-man symbol of all those done wrong by the evil coven of ex-wives.
This is why there's such venom directed at JA. They obviously believe her to have been the accomplice, and point at her quick phoning of the police as a trick she used to set BC up and take the spotlight off of herself. This is also why such fault is found with the painting plans - it is alluded to that because no one else knew of them besides JA's husband, that they carry such dire and sinister undertones. That JA has gone on to help raise a lot of money for domestic abuse aid is one of those things that a woman of her immense manipulative abilities would do. To take the heat off herself.
See how handily that ties it all up? This is why the shoes don't matter to these people, the google search has to have been a set up, and the router was nowhere near BC or his house for weeks, if not months.
Cough.