Democrats really need to stop insulting white people (who make up 70% of electorate) and men (who make up 50%) if they ever want to win again. It's just simple math. They are now perceived as anti-white and anti-men party and regardless whether they really are, in politics, perception is reality.
She was talking about the GOP, not all white people. As I already stated, Paul Ryan didn't appoint a woman a chair of a committee until there was an uproar. That's a real diversity problem. With that said, the Democratic caucus in both houses of Congress is majority white and male, so it's hard to say that Democrats hate white people.