According to the World Health organization, 77 percent of Nigerian women lighten their skin, the highest percentage in the world.
It helps with upward mobility.
Look at Ghanian-Nigerian films. The female leads are lighter-skinned.

I suggest that you read the reports of the WHO. A better line of attack is to condemn the use of toxic materials in some skin-lighteners, especially mercury salts. (httpc.www.who.int.ipcs/assessment/public_health/mercury_flyer.pdf)

Dencia, with her line of cosmetics, including her skin-lightener, is merely tapping a lucrative market.

One may regard the practice as deplorable, but it is a fact that millions practice it. Calling a practitioner a traitor to her race and heritage is tabloid overstatement.