I think it's murkier than that,
Huyang. First, speaking only for myself, I was trained by my parents without realizing from an early age to question and re-examine my beliefs ongoingly. Test theories against evidence. Be mindful of preconceptions and bias. So I'm one of the people who tries to be aware of just how much I've internalized over the last forty years from sources
other than the films themselves, and use that as a base metric to hold the newer films against. I also have a partial film-school education under my belt (I'd still like to finish, but I'm
not going to mortgage my future with a usurious student loan). So while I have issues with every Star Wars film, gradually escalating from ROTJ on, I try to keep them as objective and well-reasoned as I can. I also try to propose solutions for the issues I perceive, rather than just complain.
But while I have delved deeply into the Star Wars universe, while it's a sandbox I love playing in and revisiting often, while the vast majority of the costumes I'm working on are Star Wars related, and while I'm a demon in Star Wars trivia contests, I don't consider myself a
fan. The word is derived from fanatic, and I
do see that kind of rabid, often-irrational fervor from many corners of the internet and real life. There are people who suscribe to conspiracy theories and their own pet prejudices, impervious to such trivial things as facts. Rational counter-arguments don't make a dent. They've made up their minds what Star Wars "should" be, and when it doesn't conform to that, they go berserk.
Looking back through history, and speaking as broadly as I can so as to not invoke the wrath of the mods for invoking politics or religion, fanatics tend to be responsible for some of the worst social ills we've endured over the ages. Stubborn belief trumping rational discourse. I've been seeing the conversations on all the new Star Wars films go in circles where some try to have rational discussions and debates, where they acknowledge flaws and put forth proposed ways it might have been done differently and debate which of those -- if any -- might actually have resulted in a better telling of the story, etc. But then others derail things with a chorus that basically boils down to "it was the worst thing ever and if you like it you're an idiot", and no amount of attempts to engage in actual open-minded conversation sway them from their position.
So yes, as with any population subset, the hardcore zealots tend to be the most dangerous to the group, to the perception of the group by those not in it, and to the shared, unifying thing that subset are all into in the first place. If anyone's going to "destroy" Star Wars, it'd be the more devout fans.