This is how he wins.
Bernie can't get the establishment vote, the elderly vote. They want something he doesn't have, and he'll never win them.
But Bernie has always been an active defender of civil rights. He marched on Washington. He organized sit-ins. He was arrested for protesting.
Clinton's support of civil rights, contrariwise, is weak and based on lies.
The problem is, they don't know. If Bernie can show Black and Hispanic America the facts, he'll win categorically.