This is the dumbest post I’ve seen in this thread. How was this shit confusing.
Ren clearly said he abandoned the Sith Order.
And if you want to get fucking Real... Vadar killed the Emperor in the very first trilogy to save his Jedi Son. Did you even watch Star Wars? What the fuck are you talking about?
The entire premise of Star Wars is the internal conflict between the Jedi Order and the Sith. They switch sides all the time.
The biggest difference in this Film is that Ren killed his Master and abandoned both orders... to bring down the entire thing. That’s new to Star Wars.
Plus thats one of the main Sith philosphys. The rule of two. The apprentice main goal is to become stronger than his master and to kill him to take his place. Then to find his own apprentice to continue the cycle.