If it was as simple as a disagreement, that would be fine. But it's not just simple disagreements anymore. It is costing people their livelihoods and futures because they're not toeing the ever shifting line.
By disagree you mean people might put pressure on your employer until you are fired in order to silence you and anyone who thinks about expressing such thoughts.
Gervais is hugely powerful because he has the money to survive being unpersoned. Not everyone is in his position. His comment is like Shaquille O’Neal saying you actually can walk around and punch anyone you like in the face, because nobody retaliates when he does it (just a hypothetical, of course Shaq wouldn’t do that).