If you're equating Jesus with Yahweh, then I could see your argument.
But if you realize that Yahweh is actually the malevolent demiurge Yaldabaoth, and that Jesus came directly from the divine monad, IAO, to liberate humankind from the bondage to Yaldabaoth (i.e. Yahweh) from the Old Covenant, it makes more sense when you realize that Satan "the deceiver" is actually Yaldabaoth (Yahweh), and he just wears two different masks (Happy Bateman and Angry Bateman).
Satan tempted people with power, narcissism, and greed. Greed, power, and narcissism are the roots of the evils of capitalism, fascism, abuse, and all their earlier forms.
Jesus basically said "sell all your things, give to the poor, own everything in common, heal the sick," etc.. He was clearly a hippy socialist.
Where did he ever condone slavery, as you're claiming?