My current job function is a management position - and one part of that job is motivating employees to perform, or applying corrective action.History lessons have nothing to do with this. They are racing today. I can't go to the local circle track and expect to race with a Snell 80 helmet and a car that only meets the rules from 30 years ago.
History lessons explain past behaviors and attitudes.
By understanding how things worked in the past, and what motivations a person, or groups of people may have, it's possible to predict future behavior, or engage that person/persons in a manner that is non-confrontational.
If I were guessing, I'd see that the passionate posters are trying to protect the sport of rally. I'd want to engage that person by acknowledging their passion and working from a common point of interest.
The RHR group appears simply to be ignorant of the current state of affairs. To productively engage with them, one would engage their enthusiasm for competition and driving while at the same time suggesting that their safety rules haven't kept up with the current state of the art and are no longer acceptable in contemporary society.
In either case, the role of communicator and motivator isn't to assign blame (initially) but to find the common ground that allows forward motion. Understand current motivations, past behaviors, and move the group beyond that to reach the desired end state. As a mediator, or manager, one requirement of the job is to always maintain the appearance of control so that the involved parties retain faith in you and the process. Faith implying an element of trust without solid proof.
It sounds a bit feel good, but I can tell you it's easier to get chickens back into their coop when they want to follow you into the coop rather than chasing them around while they're scared and confused. Folks could learn a lot about how to deal with other people if they'd spent more time raising animals...