It's unfortunate that the pain she has suffered and watched her mother suffer, has blinded her to believe that the only deep feelings someone could feel for another could only be generated by the color of the skin - a black man marrying a black woman. Dorothy wonders why some black men are attracted to white women and if they are ashamed or hate their own appearance, heritage or immediate family. My response to that would be that just because someone is attracted to another who looks different than themselves is not a reflection upon how they feel about themselves, their community or their families. It is a reflection of how they feel about the object of their affection. For example, some men like women with blue eyes, so they will tend to date mostly women with blue eyes.
Some women love bald men.
Some women will not date a man under 6 feet tall. The list goes on. It has to do with chemistry and what you inherently are physically attracted to. This differs from individual to individual. What really confused me is that the bulk of her message indicates the responsibility the black men have to their race and community and sharing their financial stability with a black woman and how not measuring up to and fulfilling that duty leads to a breakdown of the family unit.