I think there is very much an open debate as to how much institutional racism, if any, remains 50 years after Jim Crow. That’s my position . I know it doesn’t fit nicely with in your absolutist world view, but there you have it. So, I don’t need to be comfortable defending it’s continued existences as I’m not advocating that. You on the other hand in post after post claim it to be completely, (not just mostly or partly) eradicated. You do have a burden to show that and it’s a bold claim. The fact that it’s difficult to do so isn’t my issue, it’s yours. The fact that you can’t do so may mean you should moderate your position.
I’m not a fan of the victim culture. Those that claim the eradication of institutional racism against one group while promoting its existence against others, need to prove it.