Theres nothing wrong with an interest in a culture, most members here are sane and still know limits. There are however a few, test84, who have an unhealthy obsession with Japan. In my opinion watching a lot of anime or listening mostly to Japanese music is normal, but when you start to reject your own culture or superimpose Japan over your own culture, this is when it becomes problematic. Take test84, who is wanting to get involved in game development. He refuses to go to the US, and insists on working in Japan(even though there are a lot more openings in US... most likely at already high positions that are better paying).
I watch a lot of anime myself, yet I still watch American shows and some old Russian movies, but I can relate closer to ideas in anime. It seems they are more liberal and open towards private life(things that would never be mentioned on US shows) so maybe thats why so many people are attached.
Also anime gives Japan the name most weeaboos see it by. Blame anime.