What's next, white knights matter too? Stop being racist just because the internet is, I thought you were above that, brother!You don't have to be white to be a white knight. It's an Internet term for people who defend others online.
.Definition of white knight from Dictionary.com, the world’s leading online source for English definitions, pronunciations, word origins, idioms, Word of the Day, and more.www.dictionary.com
It's origins are supposedly to do with a French description of lancelot.