There are basicly 7 reasons why peoples hate western cosplayers cosplaying Anime/Asian characters1. Because western cosplayers are racist againts Asians
We Asians make our Anime/Asian characters based on us Asians which mean anyone who try to imitate or Cosplay our Anime/Asian characters will be the same as trying to imitate us Asians, imitating other race is an act of racism just like the "black face" racism. You can see more details including evidences about us Asians making our Anime/Asian characters based on ourselves at http://antiwesterncosplayers.blogspot.com/2015/06/we-asians-make-our-anime-characters.html
2. Because western cosplayers are not cute
The word cute and westerners just never match up because westerners facial & body form are not cute, even there are westerners themselves who claim and believe they are cute but that "cuteness" is not the same cuteness as our Anime characters cuteness which we Asians made based on our Asian's cuteness. This reason is the biggest reason for our Anime fans in Japan for hating western cosplayers, you can see more details including evidences about this at http://antiwesterncosplayers.blogspot.com/2016/07/japanese-otaku-especially-dont-like.html
3. Because western cosplayers are too masculine
Not just in terms of attitude but also in appearance, westerners facial & body form are just too masculine including for western girls who tend to look like males. You can see more details including evidences about this at http://antiwesterncosplayers.blogspot.com/2012/11/why-westerners-fail-cosplaying.html
4. Because western cosplayers are too big/wide
The term "too big/wide" not automatically refer to someone who is fat, that term are mean to describe that westerners facial & body form are just too big and too wide to be/look our Anime/Asian characters. The reason for that is because of the fact that we Asians make our Anime/Asian characters based on us Asians, we Asians have more smaller facial & body form compared to westerners. One of the biggest fact proving this is our Asian clothing size Vs westerners clothing size where westerners clothing size are 1 - 2 more bigger compared to our Asian clothing size, for example our M [ medium ] Asian size will not be the same M westerners size but will be XS [ extra small ] or at least S [ small ] size for westerners, this mean when a westerner who have M size want to wear our Asian clothing then he/she have to buy the XL [ extra large ] or at least L [ large ] size of our Asian clothing. You can see more details including evidences about this at http://antiwesterncosplayers.blogspot.com/2016/06/you-racist-westerners-will-never-belook.html
5. Because western cosplayers are look too old
The same with too masculine, westerners are just look much more older than their real age and the comparison gap become much more wider because western cosplayers are trying to imitate our Anime/Asian characters which we Asians make based on us Asians who look much younger than our real age, know that the term "look too old" and "too old" are very different so this is not about age at all. You can see more details including evidences about this at http://antiwesterncosplayers.blogspot.com/2015/08/why-westerners-fail-cosplaying.html
6. Because western cosplayers are always ruining the Anime characters I love
When someone try to imitate other peoples, characters, etc but not look like what they try to imitate then they will obviously end up ruining the image of what they try to imitate. Anyone would feel hurt when seeing they one they love, respect, etc being mocked/ruined by other peoples, this 6th reason is the most solid evidence that western cosplayers are hurting and continue hurting millions of our Anime fans. It is just very sick when those western cosplayers are claiming that they are doing Cosplay for fun because they are doing fun by hurting other peoples.
7. Because western cosplayers look nothing like Anime characters
This is simply mean westerners don't have any resemblance at all to our Anime characters so anyone who vote this last reason is basicly voting the 2nd, 3rd, 4th and 5th reasons. As to why westerners look nothing like our Anime characters is simply because westerners don't have the same facial & body form as us Asians while we Asians make our Anime/Asian characters based on us Asians.
You can see all of those 7 reasons directly continue getting votes on the poll we make located at the top that we make in November 2016. The western cosplayers keep accusing us of being racist for banning them from cosplaying our Anime/Asian characters but you can clearly see that none of the reasons why peoples hate western cosplayers because of western cosplayers are westerners which shows and proves that we and anyone else like us are not racist, not racist because they hate western cosplayers are not because of western cosplayers race but because western cosplayers action of cosplaying our Anime/Asian characters are bad which basicly are racism against us Asians and hurting millions of our Anime fans. The real racist are the racist western cosplayers, not just racist but also sicko especially when they claim they Cosplay our Anime/Asian characters for fun because they have fun by doing racism against us Asians and by hurting millions of our Anime fans.