"In fairness they do go on about Abramovich being Russian more often than not."
Fairness? Not really, there's a diference.
While agreeing with the core of your post, if not all of it, you're right on the ethnicity tag in relation to our owner, but there is a not so subtle difference. When Abramovich is referred to it is always as Russian....Russian billionaire, Russian oligarch etc that's his nationality. When Sheik Mansour is referenced, it's always to his ethnicity as in "Arab owned Man City".
So while Liverpool and Utd are American owned, City is not Emirati owned, but Arab owned.
With Arab owned it invites all sorts prejudices that we know exist below the surface with a lot of people.
Imagine how incongruous it would be if a club were described as African American owned? People would say....what's his ethnicity got to do with it?
Russia has, believe it or not 185 ethnic group! Russians are often described as an ethnic group in their own right, but Abramovich is most likely of Slavic origin, he was born in Saratov on the banks of the Volga River. When he is referred to as Russian it is to denote his nationality, from whence he came, not his ethnic grouping, but like who cares? it shouldn't matter right? Well it seems to with our owner.
PS: Just found out Abramovich is Jewish. He's Chairman of the Board of Trustees of the Federation of the Jewish Communities of Russia, interesting, but inconsequential to his ownership, or anything else for that matter.
Jewishness is considered an ethnic grouping in many parts of the world, Russia included, though here in the UK we take a more nuanced view, but could you imagine if the media referred to Chelsea as "Jewish owned"!.....Kaboom!
PPS: And of course Levy at Spurs is Jewish, is that a religion or an ethnicity? His nationality is British...Waffle, Dither and Fudge!!......Why should anyone care?! It doesn't matter, at least it shouldn't.