If you use a non-White character as a side piece of your bait and switch white dick fencing endgame pairing fic, hell no I won't read it.
But if I do read it, don't be surprised that I don't give a shit about the romance between the two white male characters.
I'm going to be inquiring about the well-being of the non-White character that got dumped or cheated on and then never to be heard from again.
Or worse, still single and still heartbroken, not allowed to find love and happiness again because it's not your main interest and you just needed an antagonist so why not use the non-White guy/gal?
Don't be surprised when I write something loosely based off of your story that gives dignity, love, and happiness, to non-White characters and their fans.