ethnosexism 

(or ethnosexual racism): an inter-white type of racism (by white people against other whites) against white people, who are, unlike you, either in a relationship (or perceived to be in a relationship) with people of other ethnic groups.

if the term miscegenation is so esoteric in our modern soc-med world nowadays, i would not be surprised if some white people in the US who are anti-miscegenation (but not racist) actually practiced ethnosexism as a concept - as outlined above-but without realizing that this practice actually had a name, ethnosexism.

I mean whites aren't even the only people who practice ethnosexism, i mean blacks use the term "sell out to refer to other blacks being in relationships with non blacks. And Hispanics, im hearing, have a term "traidor a la raza" to define other Hispanics who are in relationships with non Hispanics

ethnosexism by Uncle Dimma November 25, 2016