Now that's a good question! Here's an answer

In a review of Hill Harper's book The Conversation, dear sister Elspeth quotes a wonderful, wonderful question:  How is it that so many black men grew up fatherless and worship their mothers but have so little respect for women?

And of course, it's not just black men--just ask the loved ones of any number of white country & western fans that grew up fatherless, revere their mothers, and yet treat women like dirt.  To answer why this is the case, let's take a look at 1 Corinthians 7.   A single mother is a woman who most likely requires a husband, according to Paul, but because of various perverse incentives in the tax code, welfare code, societal attitudes, and the like, does not.

And because she requires a husband but does not have one, she burns in lust, meeting and bedding a series of men, and...

....her children start to think that's normal, and they repeat and deepen the pattern.  More or less, the world modern feminists have asked for--no fault divorce, presumption of maternal custody and generous child support, favoring the single in welfare and tax laws--is found to be a war zone for man and woman alike. 

And it's striking as well--see Elspeth's original post--that Ivy League-educated Harper does not seem to clue in to this, or for that matter a number of other things.  It is almost as if elite education and a lifetime of privilege can inoculate a man against the truth.

Which is exactly what I would have guessed from his long term friendship with this guy, who also seems quite immune to facts, and also has multiple Ivy League degrees and a privileged background.