Here's the thing. The referee team is Rumanian. The fourth official Sebastian Coltescu, told referee Ovidiu Hategan that Basaksehir assistant coach Pierre Webo should be sent off the field for his sideline conduct.A Champions League soccer match resumed on Wednesday with a new set of officials, after the original Tuesday game was postponed following an incident of alleged racism by an official that resulted in both teams walking off the pitch.
He spoke in Romanian saying, "Du-te și dă-i lui negru, acest lucru nu este tolerabil du-te și identifică-l, du-te verifică, cel negru de acolo"
Which being translated is: Go and give it (the red card) to the black one, this is not tolerable, go and identify him, go verify, the black one over there"
Webo heard "negru" and immediately began shouting over and over and over again "Why you say negro?" It was explained that 'negru' (not negro) is Rumanian for black. Webo is the only black sideline coach present.
One and then more of the players then began to demand this and that - execution of the Rumanian for racism - accusations that he would never say "that white guy" so it must be racist and so on. Both teams walked off the pitch.
Today former Liverpool and England star (John) Barnes, who is now a pundit and a prominent commentator on racism and discrimination within society, repeatedly made clear to his followers that he believed the official did nothing wrong, and was only fulfilling his duties of passing information on to the referee . . . Barnes went on to outline his belief that the official would have acted likewise had the coach he was trying to point out been white. '[Demba] Ba said if he was white u wouldnt say white guy... but if there were 5 black coaches and 1 white coach .. he would have said “the white one”... what else could or should he say?'
This is John Barnes

Meantime, no one is discussing what Pierre Webo said and did to earn his dismissal from the sideline but it had to be rather bad since the language there is normally hot. Good job of blame-shifting Pierre