Every so often I encounter people who think that human ethnic groups work like races in Dungeons and Dragons, and I feel rather sorry for them.
Your ideas actually remind me of the barely literate from the middle ages who believed that the world was sitting on 3 whales or something like that.
Preponderance of evidence to the contrary was dismissed with 'That's not what it says in the Bible!'.
You've got same religion ("all people are equal") that goes against ALL real-world observations. But just like they waved everything off with 'Because G-d wills it', you've got 'Because racism!'.
Could you share with me the table of STR/INT/WIS/DEX/CON/CHA for Blacks, Whites and Asians? Oh, and Jews, of course.
Do we get skill and attack bonuses or special saving throws?
But I'm enough of a realist to see first generation asians / indians operating laundromats or chinese restaurants and their children becoming doctors or lawyers. So to my mind US is the land of high social mobility - for people who are intelligent and are willing to work.
A driven person will have the power to change their community, no matter their skin color. But one culture over another may be more effective at establishing the preconditions that driven people arise from. Evaluating people based on the cultural enviornment seems effective but I'm not entirely convinced that the fault lines are strictly related to race. I think people get confused when they see a group of people associated with a specific economic outcome and erroneous attribute that to race instead of culture.
Those conversations seem valuable, but it seems easy to misinterpret such a conversation as either racist or classist. Definitely these things should be talked about behind closed doors to avoid character assassination attempts.