I worked for Facebook for almost 6 years and I wouldn't say it's culture is any more liberal than the rest of the SF bay area.
For this population, they see their own views as normal and the center. While from the outside conservatives think it's far left of center, the "dozens" of employees who don't feel this way are the outliers. There are "dozens" of employees who feel FB's culture isn't liberal enough. With an employee base of tens of thousands you are going to have disagreements in philosophy, but Facebook does nothing to hide the company culture in it's hiring practice. There is no bait and switch going on. Other voices are heard, but if you have a minority viewpoint you shouldn't expect the world to pivot around what you think is right.
For this population, they see their own views as normal and the center. While from the outside conservatives think it's far left of center, the "dozens" of employees who don't feel this way are the outliers. There are "dozens" of employees who feel FB's culture isn't liberal enough. With an employee base of tens of thousands you are going to have disagreements in philosophy, but Facebook does nothing to hide the company culture in it's hiring practice. There is no bait and switch going on. Other voices are heard, but if you have a minority viewpoint you shouldn't expect the world to pivot around what you think is right.