Yes, it was a much dodgier instance and probably qualifies as racist, but unless you are saying that Troopz is racist about his own race, I don’t see how him jabbing at Willian’s hairstyle is racist.
Now just to make myself clear, I don’t doubt that there are people of African descent with Afro hair who have suffered discrimination and have that characteristic about them made fun of in order to hurt them. That’s not on. However, context is important in determining what is and isn’t racist, and in this specific case I don’t see DT, or Troopz’s comment for that matter, as racially motivated.