Star Wars is a replacement culture, that's why. People feel an overwhelming need to show off that they like it in hopes of attracting other people who do, so they can experience bonding over something, and being apart of a group.
So they decorate all their rooms with star wars goodies, dress themselves in star wars clothing, and go to tumblr to partake of the sacred, most holiest, star wars memes and fan fiction.
So sad. So sad.
*said Ming, in his room filled with anime figurines and Touhou wallscrolls*