I don't know why I got banned for this, but ok...

Look, I'm not someone who complains about getting a perma ban, but I got banned for making a lil joke in norms. Basically, A Yasuo instalocked and stole my lane. I didn't flame him, or even speak to him, but instead, I just chilled out and decided to mess with the enemy by pretending my english was horrible in /all chat. I didn't say anything wrong/toxic, I was just having fun, and the enemy team were pretty entertained too haha. Are riot banning people for not using grammar now? Anyways here are the chat Logs, Please explain to me what part of This is "extremely inflammatory or offensive".

Game 1 LunarStrike: Nayu??? LunarStrike: ko yasuo nayu midle LunarStrike: ko yasuo nayu midle LunarStrike: NAYU YASUO KO MIDLE LunarStrike: koyu fucking sayana yasuo LunarStrike: midle elugo LunarStrike: ko yasuo nayu midle LunarStrike: lane stealinger LunarStrike: please report yasuo LunarStrike: for being very lane stealing LunarStrike: i said mid and they abuse me for being not english. LunarStrike: they are friends LunarStrike: :/ LunarStrike: you are lane stealing me... is not nice :/ LunarStrike: i am just new. LunarStrike: you are stop abusing me please LunarStrike: please master yi i am not like abusive language ok? is not nice LunarStrike: please LunarStrike: ok LunarStrike: i carry LunarStrike: you are not nice LunarStrike: i am just trying to friendly LunarStrike: ok i go mid LunarStrike: i am strong LunarStrike: i say no LunarStrike: sorry LunarStrike: i say no surrender LunarStrike: i will farm eat minions top LunarStrike: very will done LunarStrike: thank you LunarStrike: my english is bad :( LunarStrike: i am trying my best to improve it haha xD LunarStrike: is everyone in game from australia? LunarStrike: oh :c LunarStrike: i am from europe but i move to australia :) LunarStrike: what is your name? LunarStrike: Hello Confidential :) LunarStrike: my name is maya, very nice to meet you :) LunarStrike: thanks you shaco LunarStrike: i am very bad LunarStrike: are you girl too? LunarStrike: not very lots girl play league LunarStrike: :'( LunarStrike: but i recently completed my high school so i have free time to play :) LunarStrike: nooo! :( LunarStrike: thank you ^c^ i wish i had a lane LunarStrike: yasuo is not very friendly :'( LunarStrike: oh my LunarStrike: well played LunarStrike: I'm, how you english people say, "boosted" :) LunarStrike: must i always forget to W :( LunarStrike: what are your jobs in real life? LunarStrike: yay :) LunarStrike: oh my LunarStrike: may I suggest a pastry? LunarStrike: oh dear i think i spelled that wrong LunarStrike: pastry is chrisian person yes? LunarStrike: wrong LunarStrike: ? LunarStrike: i think is pastor not pastry oooops :c LunarStrike: :c LunarStrike: Ahri I will pray to jesus you will not be a porn star :) LunarStrike: my friend is pornstar she jumped on many boys then died LunarStrike: ahri you are very lice LunarStrike: ok LunarStrike: wher is jesus LunarStrike: i want jesus LunarStrike: jesus will be respected because he is ****** then us LunarStrike: why does word ****** censored? LunarStrike: is not racist to say jesus is ******than us LunarStrike: it means giant yes? LunarStrike: what ****** mean? LunarStrike: black person? :( LunarStrike: jesus loves black people. i am very sorry i am not racist LunarStrike: no? LunarStrike: yasuo why are always bad to me LunarStrike: please LunarStrike: i do nothing wrong LunarStrike: why? LunarStrike: nao estendi LunarStrike: espanol yasuo? LunarStrike: ;c LunarStrike: jesus will help you yasuo LunarStrike: :D LunarStrike: khazix ahri you are very good can you teach me how to be good LunarStrike: be friends with me after game and teach me how to play please? LunarStrike: yasuo LunarStrike: they wont believe u so just stfu // This was a joke, I purposely said this on all chat. LunarStrike: ur useless yasuo just be quiet lmao they wont believe u anyway LunarStrike: . LunarStrike: that was brother of me LunarStrike: my brother LunarStrike: very silly LunarStrike: no it was brother LunarStrike: very not nice