Then the goal is making him understand that he got fired for how he expressed those opinions. He didn't just talk to HR or his manager, he published a rant for all the world to see making it the CEO's problem.
Anyone who publishes an incoherent 10 page manifesto insulting their coworkers and trashing their company's policies can reasonably expect to get fired. It doesn't matter if any of the bosses agree or disagree with the opinions expressed; it's just an unprofessional thing to do.
To be honest, he was the bully in this situation. I have more concern for the women at Google who could fear losing their jobs and the means to support their families. If a coworker of mine started publicly saying that I'm not genetically qualified for the work I do, I would be worried for my job. However, I don't think those women would become radicalized over this. Why? Because intelligent professional people don't become radicalized when other people disagree with their opinions.
A note about Trump: I grew up in a red state and lived and worked in two others. I never spent more than a few months in a blue state so I don't know how it is there, but in Trump country people openly and aggressively express all sorts of opinions without fear of recrimination. There may be a few voices of dissent, but there are no "witch-hunting mobs" forcing them to keep their views a secret.
I think this scenario Giulio describes fits better to Brendan Eich who was essentially forced out of Mozilla over his views. But Brendan didn't become radicalized. He picked himself up and founded a new company, because that's what professionals do.