In my free time, I give private lessons in almost any subject. A little note before we start: I live in Germany.
One of the guys I give lessons to, he must be around 14, once asked me "Who is Hitler?". A bit flabbergasted, I asked him back "You... don't know who Hitler is?".
Then he asked "Well... eh, isn't he the guy that the Jews worship?"
Yup. He said that.
To his defense, though, he didn't know much about history in general. I actually gave him a two hour version of the history of mankind. My voice was gone from talking so fast, desperately trying to cover everything at least a bit.
But he later asked something else, when we came to the topic of WWI. "So... in a war, they fight every day? Without break?" "Yeah, every day." "But at night everyone sleeps, right? But what if one side attacks while the other guys sleep?"
It's like he thinks nobody ever thought of that. Kinda cute, actually.
(Also, he loves to play Call of Duty and Medal of Honor games. I remember that back in my days of Call of Duty 2, it actually prompted me to research everything about WWII even before school really tried to teach us.)