> it's not their influence on modern principles and their related concepts that's in question

No, that’s exactly the question. You’re saying that the constitution protects non-white people less because it was written by white people. The logical follow-up is to ask what the constitution would look like if it had been written by non-white people. That would solve the problem, right? In that scenario, people would share more “in common” with the hypothetical non-white framers, right? That would mean they would be more enfranchised, right?

For example, what if the framers had been Bangladeshis like me? Under your logic, I’d be more enfranchised by such a constitution, because I share more “in common” with those hypothetical Bangladeshi framers. But in reality, I’d be less franchised! Because we had no indigenous notions of democracy, civil rights, due process, free speech, etc. I’m actually better off that the framers were white British people than I would have been if the framers had been my own ancestors! Similarly, what if the constitution had been written by people from west africa? The people enslaved during the founding would have been enslaved under that constitution as well!

So the original premise is false. If you’re Asian, or African, or Middle Eastern, you wouldn’t be more franchised in a counterfactual scenario where your ancestors wrote the constitution according to the precepts that prevailed in your own ancestral lands.