Firstly, let me say that anime is my favorite form of animation and I am in no way putting it down.
I never understood why some anime fans take the calling of anime a cartoon an insult. Is it due to people thinking that just because Japan makes it means it is not considered a cartoon? Do certain fans take it as an insult or them lowering the standards of anime?
I feel like anime being called a cartoon is less of an insult and just people stating the facts. The word "Cartoon" stems far back in history and basically is a term used for animation. Some people feel the term cartoon should only be limited to North American animation and not animation as a whole. Anime is made very well and like I said is my favorite form of animation, but everyone has a different opinion.