Clinton,

One expression that would accurately reflect the one you're looking for is "ethnic discrimination." I've not yet heard anyone refer to "ethnism," though I have heard - only once - "ethnophobia." The onslaught of new buzzwords can lead to complete silliness; I like to use words that already exist, in the simplest combination I can find. "Ethnic bias" is interesting because it may be in favour of or against the identifiable group.

Well, that's enough deep thought for me; time to grab a bit of sleep, pack up the car and go on vacation.

CH.