You're confused. The Constitutional authority for the Fair Housing Act (and the Civil Rights Act) is primarily the Commerce Clause. Don't know why you're talking about some need to repeal the 14th.
How about abortion or the Texas sodomy case? The Ten Commandments case? Saying "God" at a commencement ceremony? A Nativity scene at City Hall?
I believe repeal of the 14th should take care of those issues, and hundreds more, and return them to the states.