A society that values free expression should be uncomfortable with people being fired merely for holding a different political opinion from their boss.

In the Netherlands, “political opinion” is explicitly listed as a protected discrimination ground.

And in Europe generally, employee speech can fall under freedom of expression, though courts balance that against the employer’s interests, reputation, workplace disruption, etc.

Meanwhile, in the US you'll get fired by phone while your boss is golfing.

Freedom baby.