Prohibition is a fools game.
Banning a flag, much like bans on almost everything else know to man, is like putting a band-aid on a gunshot would.
The flag is a symptom, not the disease. For most people it is an historic artifact of times past when Americans chose sides on political and social issues that included (but not exclusively) slavery.
Racism is a disease that afflicts almost everyone in a society comprised of mixed races. How people act on it is dependent on a myriad of social/economic factors. And, in many “developed” societies these issues are addressed and resolved without resorting to violence as what we see in America.
Just as president Obama clearly noted in a recent interview;
“Racism, we are not cured of it,” the president said. “And it’s not just a matter of it not being polite to say nigger in public.”