Please explain to me how that comment is racist? Also, please point out the stereotype... if there is more to the quote post it.. if not you are mistaken in your assesment of that quote..
Stereotyping a whole race as menacing, alien and apart.
men·ace Audio Help /ˈmɛnɪs/ Pronunciation Key - Show Spelled Pronunciation[men-is] Pronunciation Key - Show IPA Pronunciation noun, verb, -aced, -ac·ing.
1. something that threatens to cause evil, harm, injury, etc.; a threat: Air pollution is a menace to health.
2. a person whose actions, attitudes, or ideas are considered dangerous or harmful: When he gets behind the wheel of a car, he's a real menace.
3. an extremely annoying person.
menacing - Definitions from Dictionary.com
So either meant
allwhite people threaten to cause, evil harm or injury.
All white people's actions, attitudes or ideas are considered dangerous or harmful.
All white people are etremely annoying...
You take your pick, that sounds racist to me.