Art of the Renaissance.

While I was sitting in Art History today, several thoughts plagued my concentration. It bothers me that - as far as I know - all western medieval art paints Jesus, Mary, the Apostles, -all "Holy" people-WHITE. THEY WEREN'T RICHLY ROBED WHITE PEOPLE! That's the other thing, did everyone seriously wear drapes every day? And honestly, who decides which Biblical figures get to be painted with halos? I think the corruption of the church is evident in art that they would depict Christianity according to their world. How inaccurate. Anyway I'm not a historian, but this bothers me.