Personally I think valuing diversity is allowing another person to explain their culture, their beliefs, and their history. I believe that when somebody says "i don't see color" i don't think they would mean it in a disrespectful way, but that's how some people take it because them saying that is disregarding everything the other persons race has gone through. It disregards what they're fighting for, which in most cases is rights. So I think valuing diversity is kind of like allowing other people to explain their history, beliefs, and culture.
I think the reason why she told a lie instead of the truth was because she loves her husband with all of her heart and she would hate to see him perish.