Mandella, the miners' strike, and Mosley are controversial issues.
Historians deal with known facts, and form opinions from the evidence available.
They do not always reach the same conclusions.

In this case they do.
Who knows better?
Where does that other "knowledge" come from?

Is there an analogy with the creation debate?
Most people in the world still believe in the supernatural, mythological version of that History that used to be held by the best brains.

The experts are now almost unanimous that there was no supernatural intervention, but most people prefer the old, discredited stories.

I can only say to them that knowledge has moved on.
They can only say that experts can be wrong.