[mcv]

Most people aren't going around calling people who disagree with them an "enemy of the people". Nor do they insist on loyalty to a great leader. Many Americans, for example, prefer loyalty to the Constitution or a set of principles over loyalty to the president himself.

Echo-chambers might have the feature that they don't like dissent, but that doesn't mean everybody prefers echo chambers over open discourse, nor does it mean people in an echo chamber want to apply their echo chamber to the entire country, with a great leader in charge that everybody needs to be loyal too.

So no, you're wrong about that. Not everybody is automatically a fascist, and the word does have meaning. There's a very clear difference between fascist leaders + followers, and the people who disagree with them.

And yes, there are differences between Nazism Stalinism and Italian Fascism, but they have a lot more in common with each other than with liberal ideologies. Not every liberal is liberal in the same way, not every environmentalist has exactly the same priorities, not every conservative is conservative about the same things. Similarly, it's not so strange for there to be multiple interpretations/implementations of fascism. They may differ in details, but they're clearly related.