No, obviously, but they are an action. You can be fired for an action. Your action being a political one does not protect it. That is my point.
Me saying to my boss "I believe you're an asshole and you deserve to die* is an action. I am doing something - saying something distasteful.
That can get me fired. Period. And everyone agrees. No disagreement.
Okay, now I say to my boss "I believe Jews are assholes and they all deserve to die". Now it's political. And suddenly, there's disagreement.
The disagreement is very forced. This is extremely simple. Yes, you can be fired for that. Why? Because people don't like it. Nobody wants to work with people they don't like. It's very simple, very fundamental stuff about how humans work. Making it political doesn't change anything.
Do you view holding or discussing a certain view as acting upon them? Is a distaste for Republicans in America today, for example, tantamount to acting on said distaste and assassinating someone?