Why are Gods portrayed as White?

I've been asking this to myself now. Like, if the Christians were to claim their god is real because there's people that truly lived to see him in person back then... Why didn't he shown himself as a Black Person instead? Like why not? He's all powerful so he have the power to do so right? Or is it because he's all knowing that he knows he'll get killed by his own people that hated different races?

He can easily destroy racism back then but damn, he didn't. That's not an All Loving God if he plays favorites.