The present campaign against Cosby started when an obscure comedian commented on stage about the allegations. The video went viral.
It’s been a number of years since Cosby’s made any high profile comments that piss off the left. I really doubt there’s any connection between his comments of this type and the breaking out of this story.
That Bill got away with this for so many years is probably a function of the same attitudes as the similar refusal for years to report on the widely available information about the sex lives of Tiger Woods and MR King.
When there are public black figures who appear to be “clean and articulate,” even conservatives are hesitant to tarnish their image with facts that tie in to traditional stereotypes of black behavior. The only real difference I can see is that AFAIK nobody accused either Wood or King of rape or sexual behavior that wasn’t consensual.
Cosby may also be partially collateral damage of the “war on women” and “rape culture” campaigns. Both which took massive hits in the last couple of days as the Rolling Story fraternity gang rape story fell apart.
MR King -> ML King ?