Lots of large, multinational, Google size companies have a culture of not discussing politics at work. Or if you do, it's with your friends at work, not random coworkers.
China has similarly dominant tech companies and I'm sure they do not share SV's political opinions.
You could just as easily say they were successful despite this or that aspect of their company culture.
Majority of US companies have 'diversity advocates' among the ranks of non HR employees?