Has there EVER been a black person charged with a hate crime against white people?
EVER?
Yes, its not all that infrequent. In 2013 21.4% of federal hate crime statistics documented crimes with an anti-white bias. Not all those hate crimes against whites were committed by blacks but many were.
https://www.fbi.gov/news/stories/2014/december/latest-hate-crime-statistics-report-released
From The Washington Times: “Race-based hate crimes spike in D.C.; whites most common victims, but underreporting feared”
http://www.washingtontimes.com/news/2014/aug/19/race-based-hate-crimes-spike-in-dc/?page=all