That flag is the Battle Flag of the Confederacy. A symbol of what the Confederacy stood for. It was also part of the national flag of the Confederacy from 1863-1865. The Confederacy, which included this in their constitution:
"No bill of attainder, ex post facto law, or law denying or impairing the right of property in negro slaves shall be passed." (Article I, Section 9)
"The citizens of each State shall be entitled to all the privileges and immunities of citizens in the several States; and shall have the right of transit and sojourn in any State of this Confederacy, with their slaves and other property; and the right of property in said slaves shall not be thereby impaired." (Article IV, Section 2)
Go ahead, tell us how this isn't racist or oppressive.
Not to mention how this flag was used by racists during the Civil Rights era. But I guess you think that doesn't matter too, huh?🙄