That's ridiculous You can show that you care without pretending to be black. This doesn't happen without white allies
Most do and most appreciate it trust me. The thing is I think there are certain white people who want contrite ever appreciative black folk. Oh thank you white people for being so Godly and saintly.
A short essay by SHaun King about his racial history. http://www.dailykos.com/story/2015/08/20/1413881/-Race-love-hate-and-me-A-distinctly-American-story# Personally I'm not caught up whether or not Mr. King is Black or not. But it seems he's been Black identified as a child and was never challenged about it.