Here is what J. Jackson, Jr. was referring to on the Dean blog.

[madfloridian]

I made this post earlier in the middle of a long thread. I have seen this same issue brought up over and over. Jesse Jackson Jr. said:
SNIP..."Lest we forget, the Confederate Flag is the Democratic Party's historic contribution to the South, and current Democratic candidates have not been able to figure out how to come to grips with their own historic symbol....."

I think he is right. Here is my post from earlier with a PBS story on the States' Rights Party, also known as the Dixiecrats.
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http://www.pbs.org/now/politics/dixiecrats.html
This centers on the 1948 era, when the Dixiecrats walked out on Humphrey's civil rights speech.

A portion of his speech:
"To those who say, my friends, to those who say, that we are rushing this issue of civil rights. I say to them we are 172 years late! To those who say, to those who say this civil-rights program is an infringement on states’ rights, I say this: the time has arrived in America for the Democratic party to get out of the shadow of state’s rights and walk forthrightly into the bright sunshine of human rights!"

Here is more detail on why they walked out and caused a rift that hurt the party.
SNIP..."Democratic and Republican 1948 Platforms

Part of what the future Dixiecrats objected to was the new plank in the Democratic Party platform on civil rights.
The Democratic Platform stated:
Civil Rights: Against poll tax and segregation of the armed forces. Federal laws should be made to end discrimination in hiring for jobs.
The Republican Platform stated:
Civil Rights: Against poll tax. Right to work should not be stopped by race, color or religion......"

A lot of people make fun of me because I have not seen a lot of the flag flying, and trucks with rebel flags. The reason is that most of Florida is not really like the real deep South. It really is not. Sure some places are, but Florida is not as much in the tradition of the old South as other states in the South.