As for the public challenge - you've asserted the reality of White Supremacy, which I don't dispute. The difficulty is that you apply it everywhere and everywhen to everyone.

And yes.... you've given yourself the answer to the problem now. Bangladeshi workers ARE wage slaves. They work in appalling conditions and are kept in a cycle of poverty. The cheap clothes that come out of Bangladesh are the product of their labour. I'm sure the Black workers at Walmart or Target or whatever aren't giving it a second thought. They're mostly concerned with getting enough money to feed their family, pay the rent, give their children a better life etc. So here's another thought, Bangladesh and Detroit are quite far from each other aren't they? But so are Liverpool and Alabama. Bangladeshi workers are not being exploited under the noses of black workers -but nor were slaves being exploited under the noses of the average Liverpool dock worker.

The difference here is that you feel the need to defend the Detroit workers, but not give any credence to the same argument when applied in reverse and (I'd add) in a world where mass communication wasn't a thing. That is because you likely cannot envision a world where any white person isn't guilty. That's the problem here.

A poor Black worker in Detroit isn't going to focus on wage slave brown people in Bangladesh because 1. It isn't happening under their noses and 2. They have more pressing matters to attend to. If you're prepared to see this as racist by (relatively speaking) rich Black Americans, then I'll happily condemn every 19th Century worker in Liverpool to the dustbin of white supremacy.