Yes, I did see that. He argues that she's basically a Spaniard, unlike Ari...

His issue with her isn't that she's not African enough. He was giving her stinkface before the first words came out her mouth. Just approaching him with a smile was enough to annoy him.

And while it's dumb for her to think he'd make a good partner simply because he's black, and lets be real, that's all she's looking at right now, cause she's looking past his multiple refusals and preference for her friend.

The show is trying to convey the real reason he doesn't like her is her race. It's really hard to argue subtext with people, especially people outside the diaspora. So I'm just gonna leave it be. If anyone wants to believe Bilal dislikes Rocio for reasons other than her race, go for it.