"ethnic Russian" is some bullshit. They're both eastern Slavs. Russian isn't a different ethnicity from Ukrainian.
It's a different (though, closely related) language... and, that is probably what you mean. But, even that is murky. Most Ukrainians speak Russian. There are areas where Russian is the primary language. But, that is also murky... as Zelensky is from a Russian speaking area (so, he is "ethnic Russian"??). Kharkiv is a Russian speaking area... but, not annexed... and, some of the fiercest resistance to Russia's occupation was in Kharkiv.
Pretty sure when Seattle and other vatniks say "ethnic Russian" they just mean quislings.
