I'm not even Japanese and it still insults me how you can throw around such horseshit about the Japanese
Well people don't really take enough time to think about it (the real problem but when some aren't even willing to use the auto translate to respond to a quesiton (e.g. a yes or no question) or compete for ??? or other things, some get the impression that they're being rude, rather than being unable to communicate. Also given the fact that they have a derogatory term for anyone that's not from Japan, it does create a bit of animosity.
HOWEVER, these are just stereotypes cobbled together from individual experiences, and anyone with some smarts should realize that a couple bad encounters does not mean that they all hate you or anything remotely like that. I've met many friendly japanese players, one of whom was my mentor for summoner. Today, we even had a Japanese visitor looking to us to find the best way to communicate certain things with us. People need to wise up and not just label everything they see.