B&A - Bassie & Adriaan! You've been cl0wned.

[XiZ]

He didn't state it anywhere, but it's a myth which spread around. Well, you're right and he really killed everyone who was a jew, no matter what his hair was. I was wrong about the "brown-hair" thing, but anyway he wanted an "ideal" world made of Germans with blonde hair and blue eyes. I agree with what you said, because most of the sites say that Hitler had an obsession with jews. That's because he studied in Linz, Austria. There were many jews there, but "Hitler may have been influenced by the writings of the ideologist and anti-Semite Lanz von Liebenfels and polemics from politicians such as Karl Lueger, founder of the Christian Social Party and Mayor of Vienna, the composer Richard Wagner, and Georg Ritter von Schönerer, leader of the pan-Germanic Away from Rome! movement." - Source: WIkipedia
Simply: He started to hate jews in Linz, because of some racist writers and composers(Vienna was a city full of 19th century racism)