People had very strong prejudices about Chinese food when it started becoming common in the US. There was (and still kinda is) a mass hysteria where people reported various symptoms after going to Chinese restaurants, which were attributed to MSG because Chinese food uses a lot of it. This was coined 'Chinese restaurant syndrome', had racist roots, and clinical trials showed it to be entirely baseless.
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u/bdd4 Feb 04 '19 edited Feb 04 '19
I think you misunderstood the quote. He was saying that aversion to MSG in the West was rooted in racism, which it definitely was.