Hollywood has a certain culture, which develops when certain groups of people come together and are living and working in certain industries. IMO, hollywood is in the business of make believe and entertainment and it is a cut throat and highly political business. Perception is crucial to people in hollywood, because they are in the business of creating perceptions. Sometimes, when the layers are peeled back, one gets to see how false some outward perceptions truly are and i believe this is the case with many in the entertainment industry. They are experts at creating perceptions and in the bubble of hollywood, they are protected by their own to a degree, until such time, those doing the protecting, will be harmed themselves by continuing to protect, because certain realities have been revealed.
All in all, i believe hollywood and a large portion of the entertainment industry, is second to none when it comes to hypocrisy.