@Carlton Banks

Their fans are brainwashed like in a cult. They are stubborns and don't have a lot of arguments to defend their own project. Other than saying Bitcoin cash is the real Bitcoin, Bitcoin cash is following the Satoshi white paper and Bitcoin isn't, or the lightning network is bad (for whatever the reasons they have...)
Other than that, it's quite impossible to debate with them. They have their own opinion and are not open considering something else.

Bitcoin is Bitcoin, and Bitcoin cash is Bitcoin cash an altcoin and it will always be. No matter if a day Bitcoin cash is better than Bitcoin, Bitcoin will stay Bitcoin, I won't change my opinion about this.
Otherwise, we could say Ubuntu is the real Debian or Lubuntu is the real Debian as well. And why not to say Opera browser is the real Chromium project.
Or using the Money as a comparison, it is legitime to say the EUR currency is the real US Dollar.

Using aggressive methods to promote their product isn't the good way to do it, and if they need to lie to people then they will fail soon or later. The percentage of people using Bitcoin cash is very low compared to Bitcoin, why? Because they are not interested using it. So instead to steal the Bitcoin notoriety they should rather learn from it and find their own way.

@LoyceV
I am adding this lovely screenshot to my troll collection folder for later