Yes and every single thing they've done since the original trilogy has made the idea of people forgetting about the force/Jedi completely retarded. The Jedi were a galactic peacekeeping force for THOUSANDS of years before Order 66, and were involved in multiple large scale wars throughout their history. Even if many of those specific conflicts are no longer technically canon, they are still implicitly understood to have happened or else Darth Bane would never have had to resort to the rule of two. Even if that one imperial officer is mocking the force, he clearly knows what it is and the room isn't shocked that Vader can choke him out from 6 feet away. The crew of the Ghost/Phoenix Squadron were probably the most notorious component of the initial formation of the Rebellion and they had two Jedi openly using their sabers and force abilities right up until 2 BBY. Anakin's mother, some random slave on Tattooine, knows about the Jedi. Han's skepticism can be attributed to cynicism, not ignorance. Obviously the force wasn't enough to keep the Jedi alive but he isn't surprised to see a laser sword or blindfolded training drills. Luke was probably kept deliberately ignorant by his aunt and uncle.
As for Din Jarron's ignorance, maybe the Mandalorian diaspora has lost some of their culture. Seems like they sorta live in poverty and don't have real armor, so they rely on exaggerations of the Mandalorian reputation. Maybe none of that group have set foot on Mandalore for multiple generations and a lot of knowledge taken for granted on the homeworld wouldn't be considered necessary to survive.