It's actually not protected. In fact, only very few states even have laws that protect political activity from being used for workplace terminations. And even states like NY and California make a vague exception for "political activity that interferes with the functioning of the business."

https://www.nytimes.com/2015/02/21/your-money/speaking-about...

The only ones constitutionally protected are government employees since the government cannot fire someone for 1st amendment speech (but companies can because the 1st amendment does not apply to private entities)

Now you’re reacting to hyperbole with more hyperbole.

It’s more like OP just wants to use rhetoric to have you ignore and silence Brendan Eich. Which I still think is going too far, even if I disagree with his (apparent) private political views.