It's textbook prejudice. Which is understandable, considering how freaking many of my games alone, have gotten ruined by leavers.
But the fault doesn't lie solely with you. Riot's policies are largely to blame as well. And I'll never meet you in my life anyways. We'll both die never knowing eachother's names. Hell, I've been abroad once, and that was still in Europe, close to my country. So I can't imagine about you, considering how big the USA and Canada are(but I don't know your monetary situation either). Which indicates the impact and value of my opinion; I'm a dude you'll die without ever knowing, so why would what I have to say about you matter in the slightest.
Lastly, there's nothing to give you a second chance about. You're not causing emotional or physical harm to anyone, so there's nothing to blame you for. You're being an ass in a videogame, big deal, even if you get banned, you can just wait it out(if it's a timed one) or create a new account. I might not like it, but it's how things are.
PS. I don't really care about peace, it's just a delusion, the opium of the weak. I'm cynical like that.