My wife doesnt see blacks as any different to aryans (she is Japanese) but she is westernised
When her parents came over here last month her father commented on the amount of refugees here (blacks) and said it must be dangerous because of them
I told him as long as you stay out of mcdonalds,the social welfare offices or anywhere with free internet (liberary) youll be ok

I wonder how your wife would act if she was in Japan. That's purely japanese thinking, she is Japanese, so she (partly) accepts she has nothing to say about your country. She is a guest there and not in the position to comment on stuff. That's why Japanese are such nice people.
But when she is in Japan, and some Paki or Thai gets on the train, she might think different.
As i said, many people in Japan nowadays like blacks as part of the hiphop culture, but no one seriously wants to work with them (working blacks? pardon me) or have them near.
Blacks in Japan are like monkeys in the zoo, they are an attraction, but when they get "out", they are not welcome.