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Yes, but also possible where anti-slavery forces had good intentions, other's saw opportunity. Either to shift to more profitable trade, exploit situation or as excuse crack down on competitors. Certainly many good people are concerned about racism today, others exploiting it.
Of course there will always be cynical and evil humans who seek to exploit good causes. You're not breaking news there!
I can think of 
current aberration of civilization that deliberately destroys architectural relics, books, history, religion [etc.],
and govt eliminating a People's past prior to CONQUEST.
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