Is making fun of the holocaust a permanent ban without a warning?

I won't name the player on the Boards since it's against the rules, but you can check my history anyway. I just played an ARAM game and our Ezreal, 32 seconds into the game randomly says "mmm crispy jews" in all chat, out of nowhere, no one said anything before that and no one really reacted to it. Questions: Do you think that's a hacked account and someone is trying to get it banned or is the person actually that stupid to say something like that thinking he won't get banned on sight? Is saying something like that an instant permanent ban without a warning?
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