I wonder how many people could honestly pass your "test for racism",
@esmith? Me, I'm quite aware that people harbor prejudices and biases they don't always show, or that they themselves don't always approve of. I think it's called 'human nature', and is not a monopoly of any political party.
But what to do about it? It seems you want to use those facts to undermine support for Mr. Biden, but would prefer the same facts of human nature not be used to undermine support for Mr. Trump. We'll fair enough. At least, you're not trying to hide your motives. That's almost refreshing in our Age of Lies.
On the other hand, I would suggest that what you are doing bears an ironic resemblance -- however possibly superficial -- to the behavior of the Social Justice Warriors on the left that you are so well-known to despise.
Ever hear of that Lakota proverb, esmith? The one that goes, "Chose you enemies wisely, for you become like them". It's a good proverb to keep in mind, I think.