There's just those people who, when they think they know something, refuse any other theory that doesn't support it. In this case, I would say vz. 58 is aesthetically similar to AK but design is definitely something else. It's much like trying to call AK an StG-44, sure they have similar traits and may have influenced the design of the other but all in all; different machines, different people.
On another note, I do believe that you could cure stupid. I'm just not bothered trying to. Much luck to you in making the video, not sure how many more people will finally get it what with them still not understanding from all that's already out there.
EDIT: Apologies to KC fans. . .