But let me tell you a story. Once at an SF unicorn a girl said in a public slack channel "I'd feel unsafe as a woman if my manager ever said Trump isn't a sexist." She was most certainly not fired.
So it's not been my experience that politics in the workplace is the root of the issue, because I seem to see it being really enforced unidirectionally (mind you I'm on the left myself). Hell, I've worked at two places where the CEO very clearly had a strong, personal negative reaction to Trump.
The issue I think I see is the weaponizing of PC to penalize non-left opinions as "offensive/inappropriate" which I think undermines the pursuit of truth (a value I hold higher than any political affiliation)
As a thought-experiment, suppose somebody had posted a writing exactly like what Dalmore posted in tone, but had the exact opposite view. Do you think they would have been fired for bringing up politics at work? Let's be honest with ourselves here.
[Note these two issues keep getting conflated. It may be that sexism exists, as well as asymmetrical regulations on how political speech is punished at work. ]