That's because Diaz whines and people like charismatic fighters. Diaz won because Conor didn't have what it took that night. Maybe Diaz is too much for him even if he trains better.
People are supporting Conor because he does a shitload of promos and he doesn't want to fly back right now do promos for a fight 3 months away. People are talking about it. Nobody forgot UFC 200 is happening.