The issue is that if black folks self-segregate, whites have no reason to care about them. People only really care about those in their communities or those who they know personally. If you are white and you know some black people who you like, you are more likely to care about issues that affect them that maybe you hadn't realized or thought of. Not that white people don't also self-segregate; it is human nature.
Lol!
What's so funny, bro?