Do you call everyone you disagree with "fascist"?

People seem to use it in place of "authoritative." If they were using it as a metaphor, just trying to stress they share this one particular characteristic with fascists, it wouldn't be the worst thing in the world since that is one of the defining characteristics of them . However, I don't think most people are trying to use it that way. I think they actually believe that fascist is synonymous with authoritative.