That's because the term "far right" actually does mean "far left". It's meant to be a synonym for the Nazis who were definitely not a conservative party in any sense of the word.

AfD positions: socialism is bad, smaller state, deregulation, strong law and order, no European unification, introduce Swiss-style referenda.

"Far right" (Nazi) positions: socialism is good (it's even in the name), state is totalitarian, run your own street army to destroy law and order, start a war to unify Europe and immediately abolish all voting.

These are opposing positions yet we are told they are the same. It is a rhetorical trick that renders people confused everywhere it is deployed.