In his speeches and writings, Hitler spread his beliefs in racial "purity" and in the superiority of the "Germanic race"—what he called an Aryan "master race." He pronounced that his race must remain pure in order to one day take over the world. For Hitler, the ideal "Aryan" was blond, blue-eyed, and tall. read more
The consensus is that Hitler had blue eyes. I have no idea why he preferred blond hair and blue eyes. His mistress and, last minutes' wife was blond with blue eyes. The illicit love of his life, his half niece Geli Raubal had brown eyes and brown hair. Hitler had weird notions of what an "Aryan" was supposed to look like. read more
Because they had ridiculous ideas about race, and what constituted race, and thought that the Aryans, (a pretty much made up group) was superior to others. The ideal Aryan was supposed to have blonde hair and blue eyes. read more
Hitler had the idea that the "superior" genetics were ones with blue eyes and blonde hair. And since he didn't like anyone else. He liked the angelic look of the Aryan causasians. Most of the people he persecuted were Jews, Romani people, homosexuals, disabled individuals, slaves in Eastern Europe, Poles, Soviet POWs, Jehovah's Witnesses, and Serbs. read more