I don't think Lott was promoting segregation, he was just too stupid to realize the implications of wishing for a Thurmond win. There is no doubt that Thurmond's run for the presidency was in response to Truman's integration of the military in July 1948 and because of his and Hubert Humphrey's support for Civil Rights laws. A Thurmond administration would have fought to the death against any kind of legislation that weakened segregation.
That said, this is funny to watch. He steps on his dick and dares to say something politically incorrect and even our side jumps on him. After all the crap he's pulled, some people are ready to chop his head off for this silly "thought crime".
Government mandated segregation is and always has been unconstitutional and wrong, whether it was officially declared so or not. Just as government mandated de-segregation is unconstitutional and wrong, it just is.
Doesn't matter though, we're not allowed to talk about that stuff anymore. Any discussion of whether a business in a free country should be declared a "public accomodation" is racist now.
Lott comes within three degrees of this topic and everyone has a cow. If these insignificant remarks are considered the worst thing he's done we've really lost control of the conversation. PC brainwashing has worked.