The person who posted this is definitely white. As a white person myself, I find this post amusing. Do you know why? It's because you're trying to validate yourself. Accepting who you are is essential, and posting this type of content won't help with that.
Pretending to be the 'good guy' is simply foolish. We're all flawed, but I believe most people try not to be. History has occurred, and all you're doing is dredging up its worst aspects. Move on.