How did trade cause change in north africa?

After trading with European countries Africa fell into European ways of living and standard of beauty. This is when we start to see the great triangle of slave trade between different Prisoners of war of rival African tribes and the Europeans. Also we start to see that blacks are now less than whites and aren't human. this is where we start to see black features (like their hair, nose, skin color) discouraged and ordained ugly and unacceptable. It's crazy how the same features they discouraged back then are now welcomed, accepted, and encouraged today on every race and color except for on blacks.