"Dylan Roof was raised by white people. YOU built him."  Pal, because I am white you may try and link me to and lump me in with that sorry, sick SOB all day long - it's BS and I ain't buying it. This format prevents me from responding to that insult in more explicit terms.
As far as a shared "public morality" no one (or at least I don't) dispute the double standard that exists and that this country was founded on. The public morality that I think Mr. Gilbert and that I refer to was a sense of moral injustice that resulted in passage of the Civil Rights Act and Voting Rights Act some 50 years ago; Johnson's War on Poverty; Labor Laws passed earlier in the 20th century, etc. And yes, I know these were not universally supported, accepted, or enforced. The point being that at one time in this country enough people had a basic sense of decency and, right and wrong, to get them passed. Unfortunately, that morality or decency seems to be waning, to be replaced with a "me first" ethic.