[kMal]

Don't think too much about the insults, it'll only make you feel awkward. Try to accept (if you have not already) that Japan is your personal interest, and it is not for somebody else to insult you for that.

Edit (I noticed I did not answer your question haha): I have not been insulted or picked on when I was a child for liking Japan. People here seem to like my interest in Japan and Japanese culture.