I lived in Nigeria and travelled Black Africa quite a bit, What Yaya is doing has nothing to do with the colour of ones skin and everything to do with being Black African, that's why countering Yaya's bullshit with Sterling and Sané is a waste of time.
He mentions skin colour in the interview too.
“He was cruel with me. You think Barcelona could have done that with Iniesta? I started thinking if it was because of my skin colour. I’m not the first to talk about these differences in treatment. At Barça, others asked themselves that."