Why is Otaku more hated in Japan than in other countries..?

Is that true..??

BQ : What's the difference Wotaku, Fujoshi, Itasha, and Hikikomori .. ??

BQ2 : I saw video a cover song of anime http://youtu.be/MjC4C2rAo54 the question is, why did they hide their face..??

BQ3 : If I only like anime only, Am I considered an Otaku??..??
3 jawaban 3