[jariel]

So if it was 'Polish' food and the same phenom existed, would we say 'racism'?

No, but probably some mild bits of cultural stereotypes, and frankly - there are good ones and bad ones.

As an example of 'positive' cultural stereotypes and possibly racism is 'Traditional Chinese Medicine' - the majority of the practice (all of it?) has zero scientific foundation and is essentially a sham, yet zillions of Westerners pay zillions of dollars for all sort of 'Ancient Chinese Knowledge' which is just quackery.

Finally, if there were a significant campaign to demonize 'Doritos' as 'plastic food' much in the same way some people feel about margarine, or hydrogenated fats ... and if we felt 'Chinese food' were 'always natural' then the opposite prejudices might occur.

The technical argument for 'racism' could be made but it would just be needlessly aggravating.