Another way to look at this is... job openings are coming to Basecamp and people know the culture is a no politics at work place. I bet a lot of people will sign up for that. Enough to fill the openings.
I wouldn't call it SV culture. I think it's more the culture of people who are trying to use companies to promote their political ideals.
I grew up and first worked in a region where your employer was not your everything. People worked (often times with a diverse set of people) and then outside of work were part of other groups for their interests and ideologies. That separation enabled people from many walks of life to work together. I'd like to see more of this.
I do love the idea of no politics at work. Politics is not intellectually interesting for me.
Those who have the expectation of talking progressive politics at work and getting what they want or they leave.
I wouldn’t touch any of them.