If Snoke isn't a Sith and they are extinct....
Why does Kylo reference the Sith as being one of the old things that must die in TLJ? It's possible to chalk it up as Johnson just not being consistent, but in story wise there will be an explanation ofc. I recall that group "The Acolytes of Beyond" whom collected Sith artifacts to preserve their legacy which included Vaders helmet. Maybe Snoke inherited that knowledge when he became The FOs leader and told the Knights of Ren to use it as a foundation for their teachings but to become something new all together with probably his own teachings. What do you guys think?