If white people are the only ones responsible for slavery, why aren’t they also credited with being the only ones ending it?

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The whole point, which seems to have gone over so many people’s heads, is that the entire human race practiced slavery at some point, most races still do, except whites. Yet slavery is only white people’s fault because the western left needs it to be to get votes because they lack much else to run on but emotion and hyperbole. The rank hypocrisy is what i was drawing attention to. I’m sorry if the cognitive dissonance of the truth coming to light makes you big mad.
If white people are the only ones responsible for slavery, why aren’t they also credited with being the only ones ending it?
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