The Confederate flag is a symbol of TREASON against our nation's union. It is like raising a Nazi flag where there are Jews. Sure, the flag may be a symbol of southern culture, a fact of which I personally would not be proud, and somebody's granddaddy might have died under that flag but it is a flag symbolic of oppression, slavery, hate and murder. It is emblematic of a group of people who want to return to an age where people of color are crushed under its yoke. Remove it.
