No one said he was targeted because he was black, only that he was handled more forcefully because he was black. That he wasn't taken seriously in his pleas for help because he was black, and that it was exacerbated by the cop fearing looking weak in front bystander asking him to ease up. You are insinuating his behaviors being contrary to what evidence shows and I'm not sure why. Why is it important to find justification for extreme force?
The case of George Floyd, while tragic and worthy of being outraged over, is sadly not an outlier. There have been other cases, with nearly the same circumstances. I'm sure there are many people who have died at the hands of cops whose story will never be heard of or given the light of day. It's important to know that's it's not a "black" thing, but rather a "police" thing.
If you don't believe me, I invite you to follow this CBS News link, from a case in 2016.
(Warning, the video in the article is graphic)