Why do all blacks racist towards whites?

I was out with my friends and I was wearing a confederate flag shirt and talking about white pride very loudly. Some black guy came up to me and threw a soda at me and called me a white cracker. I was hurt and very offended so I call him the N word because I was angry. Anyways he pushed me down and beat me up. All these black people were cheering and someone started playing loud rap music. No one stopped this guy from beating me up. Why can't I talk about white pride in public; i have that right. All blacks are violent racists