How I get restriction

I get restriction cause I said my mate was idiot when he being toxic to me first (He said %%%%%%%%%%% to me and i am a Chinese). When people being toxic to me, did I have right to fight back ? Can i get a explaination? And did u guys, I mean Riot gives restriction to those player who always said %%%%%%%%%%% ? Our game supposed to be a national wide game, why those people who always say %%%%%%%%%%% and never get punishment ?? Is that not belongs to Racial discrimination?Last thing is that the reason they give to my report is unsportman behavior, i didnt feed or AFK at all . I need a explain for this thanks.
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