This is so hilariously wrong that I don't even know where to start.
Google's culture was predicated on hiring intelligent, emotionally-continent adults. Free discussion of politics wasn't banned during my time there because everyone was capable of understanding precisely the opposite of what you're describing: that differing views on the world exist and are attributable to more than just whether someone is a good or bad person.
When you scale to a hundred thousand employees, you can't keep your bar that high, and you have to start letting in people who more closely resemble the average narrow-minded, maximalizing dumbass. For a little while that meant the company needed to bow to the more culturally-powerful regressive left (esp when things leaked, for PR reasons), but as the culture war heats up, the only winning move for a company with a (classical) liberal founding culture is to discourage political engagement at all.