I highly doubt the vast majority of people who (to use your term) supported JB in the past did it having a clue what type of person she was/is.
It is fair to allow people to not believe simple gossip (which is what it was back then) and make their own observations, etc.
If we (horse people) always believe ever bit of gossip there would not be any BO/trainer/HO who was good enough to do anything with a horse because there is not a single person who does not have someone who is saying something about them.
Move on. Stop pouncing on people for being taken in the past.