When you're proud of being "white"...the question that comes to mind is "why, what's behind it?"...what IS there to be proud of?
Nothing to feel proud about, unless you're showing off to someone else.And it clearly means that you "think you're better than".
PROUD- "feeling deep pleasure or satisfaction as a result of one's own achievements, qualities, or possessions or those of someone with whom one is closely associated"...tell us, what's so special about being white, that makes you proud?Let's know the reason behind it, to determine if it's racist or not.
Only a SHOW OFF would be proud of being a race. It's just showing off to someone else.