"A rioter was toxic, so can I have my account back?" Come see Riot's answer....
So you've heard that Daniel Z Klein was toxic on twitter. Good for you.
Riot's policy about behavior in-game has always been that other people's behavior in-game doesn't justify your retaliations against them. What do you think they will say about you asking if behavior outside of the game justifies that behavior in-game? The answer is and always will be, no.
Toxicity in-game is punished because it's disruptive to the game and runs counter to the purpose of the game, IE for people to have a fun, cooperative and competitive experience. It's not even about whether or not it's hypocritical or morally acceptable to say that kind of thing to another person. It's just plain disruptive to the game, and you already know this.
Stop hijacking a legitimate issue for your own selfish reasons. Your behavior in-game had nothing to do with someone else's behavior anywhere. And the people who care about DZK's tweets are sick of you trying to use their outrage for your sleazy attempts to get yourself unbanned.