This prejudice against other races based on smells is really nothing new. We poke fun at angmohs for their queer smells because they ate cheese. We poke fun at Indians for the coconut oil they put on their bodies. I think that we should not carry this out into open verbal attacks. Leave them at the friendly joke level. Everyone raises a stink when they sweat. I have encountered decently dressed Chinese who stank like a cesspool. I think it has to do with their hair. They sweat and the odour comes out thru the follicles on the head, and that's where most dead cells (dandruff) are. With the bacteria acting on them, you have a stink.
We should target our prejudices against their avariciousness, their coming here to leech on us, their lack of consideration, their uncouthness, their false sense of superiority that they can scold everybody because they are stronger with the English language etc. These are behaviours that they can change and shud change, not smells or looks.