To answer your question; try to analyze why this made you so angry. Some guys do have a preference for a certain race or ethnicity. I think it's silly but it's the way it is.
On the guy you mentioned... 8 hours is a long way. By car I'd guestimate the distance as around 1000 to 1200 miles? Granted the remark about going to Japan to see girls in cat ears was silly but all I see in yours or his criteria for a relationship is what each other looks like. That also seems silly especially with that much distance between you. And last but maybe not least... it was a chat room. I can't think of many things said in a chat room that would upset me. Maybe if somebody started talking about torturing kittens maybe but it's the internet. People say all kinds of ****. And seriously, you were further upset because it took 51 minutes to get a response to a post about anger over something said in a chat room? BTW all questions were rhetorical.