>When I talk to my family and non-tech non-coasts non-city friends about the sort of political polarization I encounter at my high-tech Seattle job, they often think I'm messing with them, that I'm being facetious or exaggerating.

Finally! I have been pointing this out as being mostly a tech circle thing. But almost every time I get downvoted for it.

The question here is, why Tech? What is specific about Tech as an industry, and that is not just in US, it is also spreading in UK, ( or mostly English speaking countries ). I assume it has something to do with Social Media. But then other industry also have access to social media usage as well.